I am using QB Essential. Suppose I ordered a dozen T shirt at cost of $3/shirt. Then I printed it with an additional cost of $2/shirt . Total cost $5/shirt. I am selling at a price of $8/shirt with a profit of $3/shirt. Now how should I manage those cost and price. What accounts should I create or charge to, so my cost and profit are separated and eventually I know my taxable income. Please explain that.