Exercises 61–64 describe a number of business ventures. For each exercise,

a. Write the cost function, C.

b. Write the revenue function, R.

c. Determine the break-even point. Describe what this means.

You invest in a new play. The cost includes an overhead of $30,000, plus production costs of $2500 per performance. A sold-out performance brings in $3125. (In solving this exercise, let x represent the number of sold-out performances.)