A company manufactures cassettes. Its cost and revenue functions are C(x) = 26,000 + 30x and R(x) = 43x, respectively, where x is the number of cassettes produced and sold in a week. How many cassettes must be sold by the company to realize some profit?
x > 2,000
For making profit, revenue function must be more than cost function.
R(x) > C(x)
43x > 26,000 + 30x
13x > 26,000
x > 2,000.