General Chemical Company (GCC) manufactures two products as part of a joint process: A1 and B1. Joint costs up to the split-off point total $22,000. The joint costs are allocated to A1 and B1 in proportion to their relative sales values. At the split-off point, product A1 can be sold for $42,000, whereas product B1 can be sold for $63,000. Product A1 can be processed further to make product A2, at an incremental cost of $38,000. A2 can be sold for $85,000. Product B1 can be processed further to make product B2, at an incremental cost of $48,000. B2 can be sold for $95,000. Joint costs allocated to product A1 total: a. $8,800. b. $13,500. c. $13,200. d. $22,000.