Got the first part right but struggling with second part .

Required information A process for producing the mosquito repellant Deet has an initial investment of $210,000 with annual costs of $52,000. Income is expected to be $90,000 per year. Vhat is the annual breakeven production quantity for both payback periods if net profit, that is, income minus cost, is $10 per gallon? Consider the rounded values of years calculated in part a. Also, round your answer to the nearest integer.) When i=0%, the annual breakeven production quantity is determined to be gallons per year. When 1=12%, the annual breakeven production quantity is determined to be gallons per year