Trying to learn how to calculate my cost to produce an order in the manufacturing. I can easily take the cost of the goods, the exact time that an employee spent on a job, the commission of the sellers, the shipping and subtract it from the total bill to see how much it costs to produce and what my benefit is, but that would not include rent, insurance, utilities, etc., and would not include odd expenses that may appear in the month of May to fix a piece of equipment. Should I take my annual general expenses NOT directly related to a specific job, divide them by the hours that we work to calculate the additional cost that I must include for each order? It's that easy?