Evaluate the correct solution of the following problem

Problem- A manufacturer of electronic components can sell n thousands of a component per week at a price per thousand is p = 200-1.5n where n is the number of thousands. The cost of production is dollars per thousand is c = 0.2n2-20n + 600.

Part 1- Determine the breakeven point, where selling price equals production costs.

Part 2- Determine the number of parts to be manufactured that will give the largest profit.

I need assistance to find the breakeven point, where selling price equals production costs.