Why is the discount on sale applying plus instead of minus in BUSY?
When you apply discount in the bill sundry and if it is applying as plus instead of minus then in the discount bill sundry then bill sundry type selected as additive instead of substractive. To correct this follow these steps:
Step 1: Go to administration menu then select masters option.
Step 2: Select bill sundry option and click on modify.
Step 3: Choose the discount bill sundry and after opening it set bill sundry type as substrative. If transactions exist with that bill sundry then you can not change it.