Yang Manufacturing makes a product called Yin. The relevant range of operations is between 2,500

units and 10,000 units of Yin per month. Per unit costs at two activity levels are as follows: 5,000 units

at $17.00 per unit; 7,500 units at $13.00 per unit. Determine the cost formula that expresses the

behaviour of Yang's total costs.

full explanation plz