Calculation error when applying coupon..

Calculation error when applying coupon..

I notice there is a calculation error when I am applying a coupon. I put a coupon in with a value of 10%. When it goes to the shopping cart it says this:

Subtotal 34.95 USD
Discount -3.50 USD
Total 31.46 USD

The total should be 31.45. It appears it is rounding the coupon amount from 3.495 which makes it 3.50. This is fine if it used this amount and then subtracted it from 34.95. It appears it is using the full amount of 3.495 and subtracting, which would give a total of 31.455, and then again rounding it, which would give 31.46.

Just to check, I changed the quantity to 3, and here is the result:

Subtotal 104.85 USD
Discount -10.49 USD
Total 94.37 USD

Again, the total should be 94.36.

Can you point me to where the calculation is being done and perhaps give a code fix I could insert to correct this problem.



Thanks
Doc

Aw: Calculation error when applying coupon..

Can anyone help with this, or point me to which file this calculation is begin performed? I have everything ready to go, but would like to get this calculation correct. If I have a setting incorrect that causes this, could someone point me to that setting?

Thanks,
Doc