Factory Company makes two products, X and Z. X is being introduced this period, and Z has been in production for 2 years. For the period about to begin, 1,000 units of each product are to be manufactured. Assume that the only relevant overhead item is the cost of engineering change orders; that X and Z are expected to require eight and two change orders, respectively; that X and Z are expected to require 2 and 3 machine hours, respectively; and that the cost of a change order is $600. If Factory applies engineering change order costs on the basis of machine hours, the cross-subsidy per unit arising from this peanut-butter costing approach is