Insurer Y is using the pure premium ratemaking method in estimating expenses per exposure unit based on the insurer's past expenses. Insurer Y knows that incurred losses are $4 million (including loss adjustment expenses of $500,000 ) All other expenses are $1.5 million. The earned-car years used in the calculations are 100,000. The expenses per exposure unit are A. 510 . B. $15. c. $17 D. $20.