Arlene makes earrings in the shape of the mascot of a local university. last year arlene made 250 pairs of earrings, which she sold to the university bookstore for $10 each. arlene works out of her home, so her only cost is $3 per pair for materials and $85 for tax . if arlene didn't produce earrings, she would spend her time babysitting her nephews and make about $500 per year. a. arlene's economic profit is $1,665. b. arlene's accounting profit is $1,165 c. arlene's total costs are $835. d. arlene's total revenue is $2500.