Margin of safety Organic Health Care Products Inc. expects to maintain the same inventories at the end of 20Y8 as at the beginning of the year. The total of all production costs for the year is therefore assumed to be equal to the cost of goods sold. With this in mind, the various department heads were asked to submit estimates of the costs for their departments during 20Y8. A summary report of these estimates is as follows: It is expected that 400,000 units will be sold at a price of $25 a unit. Maximum sales within the relevant range are 500,000 units