Cogswell Cogs has monthly fixed costs of $112,500. The variable costs are $6.00 per unit. If the sales price of a unit is $19.00 and 7,500 units are manufactured and sold, the company's total variable costs will be O $142,500. $45,000. $97,500. $112,500. 7.14 pi Question 26 J.J. Granite is thinking about replacing a rock crusher at Slate Rock and Gravel Company. In regards to this decision, the cost of old crusher purchased five years ago is: a direct materials cost. an opportunity cost. a sunk cost. O a differential cost