2. A manufacturer of wireless microphones has monthly fixed costs of $8,925 and variable costs of $110 per unit for a particular model. The company sells each unit for $145 each. Write a monthly total cost function for this model of wireless microphone. ii) Write a function for the revenue. iii) Write a function for the profit. iv) Determine the break-even point for the company. ** v) Find the marginal profit and explain its meaning. **