[Skip to main content](#vessel-content) # dynamic pricing based on pro rata ## - **[veeco](/forum/user/18501-veeco "View veeco's Profile")** - [![veeco's Avatar](https://www.hikashop.com/media/kunena/core/svg/person.svg)](/forum/user/18501-veeco "View veeco's Profile") Topic Author - [ Offline](/forum/user/18501-veeco) Less More - Posts: 175 - Thank you received: 0 - - 11 years 7 months ago [\#198291](#198291) by [veeco](/forum/user/18501-veeco "View veeco's Profile") *[dynamic pricing based on pro rata](/forum/31-development/876330-dynamic-pricing-based-on-pro-rata#198291 "-- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks!")* was created by *[veeco](/forum/user/18501-veeco "View veeco's Profile")* -- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks! Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzMxLWRldmVsb3BtZW50Lzg3NjMzMC1keW5hbWljLXByaWNpbmctYmFzZWQtb24tcHJvLXJhdGE/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. - **[Jerome](/forum/user/80-jerome "View Jerome's Profile")** - [![Jerome's Avatar](https://www.hikashop.com/media/kunena/avatars/resized/size144/users/avatar80.png)](/forum/user/80-jerome "View Jerome's Profile") - [ Offline](/forum/user/80-jerome) - HikaShop core developer Less More - Posts: 26400 - Thank you received: 4079 - - [](http://obsi.dev) - 11 years 7 months ago [\#198294](#198294) by [Jerome](/forum/user/80-jerome "View Jerome's Profile") Replied by *[Jerome](/forum/user/80-jerome "View Jerome's Profile")* on topic *[dynamic pricing based on pro rata](/forum/31-development/876330-dynamic-pricing-based-on-pro-rata#198294 "-- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks!")* Hi, Yes you can dynamically change the product prices. The plugin "system / custom_price" (also called "donation plugin") already perform that task and is a good example for such implementation. You can read more about the price triggers in the developer documentation [ www.hikashop.com/support/support/documen...mentation.html#other](http://www.hikashop.com/support/support/documentation/62-hikashop-developer-documentation.html#other) Regards, --- Jerome - Obsidev.com HikaMarket & HikaSerial developer / HikaShop core dev team. Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzMxLWRldmVsb3BtZW50Lzg3NjMzMC1keW5hbWljLXByaWNpbmctYmFzZWQtb24tcHJvLXJhdGE/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. - **[veeco](/forum/user/18501-veeco "View veeco's Profile")** - [![veeco's Avatar](https://www.hikashop.com/media/kunena/core/svg/person.svg)](/forum/user/18501-veeco "View veeco's Profile") Topic Author - [ Offline](/forum/user/18501-veeco) Less More - Posts: 175 - Thank you received: 0 - - 11 years 7 months ago [\#198323](#198323) by [veeco](/forum/user/18501-veeco "View veeco's Profile") Replied by *[veeco](/forum/user/18501-veeco "View veeco's Profile")* on topic *[dynamic pricing based on pro rata](/forum/31-development/876330-dynamic-pricing-based-on-pro-rata#198323 "-- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks!")* Perfect !!! Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzMxLWRldmVsb3BtZW50Lzg3NjMzMC1keW5hbWljLXByaWNpbmctYmFzZWQtb24tcHJvLXJhdGE/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. - **[veeco](/forum/user/18501-veeco "View veeco's Profile")** - [![veeco's Avatar](https://www.hikashop.com/media/kunena/core/svg/person.svg)](/forum/user/18501-veeco "View veeco's Profile") Topic Author - [ Offline](/forum/user/18501-veeco) Less More - Posts: 175 - Thank you received: 0 - - 11 years 7 months ago - 11 years 7 months ago [\#198374](#198374) by [veeco](/forum/user/18501-veeco "View veeco's Profile") Replied by *[veeco](/forum/user/18501-veeco "View veeco's Profile")* on topic *[dynamic pricing based on pro rata](/forum/31-development/876330-dynamic-pricing-based-on-pro-rata#198374 "-- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks!")* Do you have tutorial on it ? i assume by default all field with id='amount' will be replace by the plugin i tried the demo, turn on the donation plugin, but the product page display "FREE" instead of Pricing Field Last edit: 11 years 7 months ago by [veeco](/forum/user/18501-veeco "View veeco's Profile"). Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzMxLWRldmVsb3BtZW50Lzg3NjMzMC1keW5hbWljLXByaWNpbmctYmFzZWQtb24tcHJvLXJhdGE/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. - **[Jerome](/forum/user/80-jerome "View Jerome's Profile")** - [![Jerome's Avatar](https://www.hikashop.com/media/kunena/avatars/resized/size144/users/avatar80.png)](/forum/user/80-jerome "View Jerome's Profile") - [ Offline](/forum/user/80-jerome) - HikaShop core developer Less More - Posts: 26400 - Thank you received: 4079 - - [](http://obsi.dev) - 11 years 7 months ago [\#198377](#198377) by [Jerome](/forum/user/80-jerome "View Jerome's Profile") Replied by *[Jerome](/forum/user/80-jerome "View Jerome's Profile")* on topic *[dynamic pricing based on pro rata](/forum/31-development/876330-dynamic-pricing-based-on-pro-rata#198377 "-- HikaShop version -- : 4 Hello, i'm planning to work on a plugin that can calculate upgrade/downfrade fee on prorata basis : -is it posible to modify the item price 'on th fly' to a cart? Thanks!")* Hi, The donation page in our demo website is like a documentation page but we saw that the links are not working like they should. We already created a ticket in our side in order to fix that issue for the demo website (links which should point to the backend of the demo website). [ demo.hikashop.com/index.php/en/hikashop/...t-page/donation-page](http://demo.hikashop.com/index.php/en/hikashop/product-page/donation-page) Regards, --- Jerome - Obsidev.com HikaMarket & HikaSerial developer / HikaShop core dev team. Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzMxLWRldmVsb3BtZW50Lzg3NjMzMC1keW5hbWljLXByaWNpbmctYmFzZWQtb24tcHJvLXJhdGE/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. 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