Ms. Nili already has orders for the 10 custom dresses reflected in the March forecasted in- come statement. The depreciation charges are for machines used in the respective product lines. Machines depreciate at the rate of $1 per hour based on hours used, so these are variable costs. In March, cutting and sewing machines are expected to operate for 900 hours, of which 600 hours will be used to make custom dresses. The rent is for the building space, which has been leased for several years at $7,000 per month. The rent, heat, and light are allocated to the product lines based on the amount of floor space occupied.