Inequality word problem

Question

A certain company manufactures electronic pocket calculators. the cost of the parts to make each calculator plus labor to produce and market each calculator is $12. if the weekly overhead of the company is $1500, and if each calculator produced is sold for $30, how many calculators must be produced and sold each week in order for the company to show a profit

Answer 1

Profit = Revenue minus cost

P = R-C = 30x - 12x - 1500 = 18x -1500 =0 to break even

18x =1500

x = 1500/18 = 500/6 = 84 to make a profit of $12. Make less than 84 and the company has a loss

To make a profit the company has to sell more than 83 calculators per week.