I personally would not link sales income and expenses to the same item. That means you are unreporting total actual sales. From a tax return standpoint, a CPA wants sales to be TOTAL SALES. Your deductions, expenses, COGS, are put on a Schedule C separately. Even tho your bottom line might get to same number, its not the best way to do it. Also makes it harder to analyze your profit margins etc.

if I can see total sales, and if i'm trying to figure out why I am not making money, I want to see my expenses relating to those same sales (COGS), this way I can go thru the COGS accounts and see if there is a way to lower any of those costs. i do not want them lumped all together. that is not a true represenation of your COGS if you link costs to an income account. Just my two cents.,