Changing - "per unit for buying at least"

-- url of the page with the problem -- : www.freshandwipe.com/product/27-microfib...freshener-mini-shirt
-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.6
-- PHP version -- : 5.6.24

Hello,

If you visit one of my product pages you will see the price changes based on quantity.

www.freshandwipe.com/product/27-microfib...freshener-mini-shirt

I need to change the wording of:

$2.99 each
$2.33 per unit for buying at least 3
$2.00 per unit for buying at least 12

to something else. I was wondering what php file might have that wording. I need to change it to something like

$2.99 each
$2.33 each for 3 to 12 units.
$2.15 each for 12 or more units

thank you