I have been told the current coupon calculations are wrong for UK users
with settings Display Prices with Tax, Include Tax = true on Group Discounts.
Put $100 item in your cart. Use Display Prices with Tax, and in Group Discounts,
set include tax = true. This is what your cart will show in Zen Cart 1.3.7:
Sub-Total: $117.5
Store Pickup (Walk In): $0.00
Group Discount: -$11.96
VAT 17.5%: $15.75
Total: $103.79
Like I said, I have been told these numbers (above) are wrong. I have been told
that the numbers below are correct:
Sub-Total: $117.50
Store Pickup (Walk In): $0.00
Group Discount: -$11.75
VAT 17.5%: $15.75
Total: $105.75
If you agree, then download the zip attached and install it on your cart.
If you need the corresponding fix for UK coupons, please see the thread
http://www.zen-cart.com/forum/showthread.php?p=366574
Scott
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