oharris wrote: It is an additional fee for USD 150. So it is fixed. As in the demo site (
2015conference.icac.org.jm/v2/index.php/register
), when the user clicks on a registration charge (Non-member for $610) , the amount is added to the cart, but during the process of filling in the form, the user should be able to select option of adding that other fee (for an additional workshop) and the fee of 150 added to the cart upon checkout or when they click "Next".
Wouldn't be easier to create 2 products: $610 and $610+$150, add checkbox for workshop to price table and switch url of register button with javascript or css?