I have implemented the 50% Discount button according to Emre’s tutorial here http://sambapos.org/wiki/doku.php/en/adding_discounts_to_orders_with_order_tags
The result is that I successfully get the button to apply 50% discount to the item, but cancelling it results in the item showing wrong price. Ie:
Fish Cracker 2.50 --> apply discount --> 1.25 --> Cancel Discount --> 1.88
I have recreated all the steps 4 times just to ensure that I am not missing anything. Same result every time. Please help.
Thanks in advance