This month your vendor invoiced $45,000 in testing charges for your production run. The unit cost for testing is twice as much for each of the first 400 units per month as compared to each unit over 400. If we shipped 500 units to the vendor this month, find: 1. Average cost per unit (Total cost/ No. of units sold) 2. Cost per unit below the price breakpoint 3. Marginal cost for the 650 unit (1 mark) (1 mark) (2 marks) (Hint: For (c) determine the single equation for the 400 units and the remaining 100 units, then solve for x, then work out (b))