Waterways has a sales mix of sprinklers, valves, and controllers as follows. Annual expected sales: Sale of sprinklers Sale of valves Sale of controllers 485,415 units at $26.00 1,561,770 units at $11.00 63,315 units at $42.00 Variable manufacturing cost per unit: Sprinklers Valves Controllers Fixed manufacturing overhead cost (total) $14.00 $8.00 $30.00 $746,000 Variable selling and administrative expenses per unit: Sprinklers $1.00 Valves $1.00 Controllers $3.00 Fixed selling and administrative expenses (total) $1,663,212 (a) Determine the sales mix based on unit sales for each product. Sprinklers Valves Controllers Sales mix % % %