Wren Co. manufactures and sells two products with selling prices and variable costs as follows: A) selling price $18.00, variable costs $12.00, and B) selling price $22.00, variable costs $14.00. Wren's total annual fixed costs are $38,400. Wren sells four units of A for every unit of B. If operating income was $28,800 what was the number of units Wren sold?
