I bought $5000 worth of stock (10 products, 25 units of each product, 250 units total) which I submitted as an expense in Zoho Books under 'Supplies: Stock'. I also set up Zoho Inventory and included the 'opening stock value' ($20) for each product and used 'Supplies: Stock' in the 'Purchase Information' area.

My issue though is when I run a PNL, the $5000 initial expense is included in the expenses area (Supplies: Stock), but so is the 'opening stock value' for each item I have sold. So in theory, the expense of these items is being included twice. For example, if I sold 10 units at $40, my PNL will look like this:

Income: $400 (10 units x $40)     |      Expenses: $5000 (original invoice) + $250 (cost price ($25) of 10 units sold)

What have I done wrong?