please show the steps to find the answer

Product M's expected selling price per unit is $36, the projected variable cost per unit is $20, and estimated fixed costs per month are $24,000. 21. If 10,000 units are sold in a given year and fixed costs are increased to $40,000, the overall profit or loss is a. $120,000 profit c. $30,000 profit b. $160,000 profit d. $320,000 profit