We generally offer large disconts on products and what's happening is that when generating a P&L, Zoho is putting a Discounts line up and then the total revenues from each sub sales accounts whicn makes it very difficult to get a clear picture. Here is an example

Sub Sales 1 account:

Invoice 1: $100, discount $15, total $85

Invoice 2: $200, discount $20, total $180

Sub Sales 2 account

Invoice 1: $100, discount $10, total 90

When I generate P&L, I get the following

Discount: $ 45

Sub Sales 1: $300

Sub Sales 2: $ 100

As you can see, this makes it very difficult to see the actual value of each sub sales account. I would ideally not have discounts show up in P&L and simply have the report as 

Sub Sales 1: $165

Sub Sales 2: $90

The end result of total sales is $355 in both the above scenarious but it's much clearer in reports if discounts are disabled.