Areview of the 2015 tax file of gregory, a single taxpayer who is age 40, provides the following information regarding gregory's 2015 tax status: adjusted gross income $40,000medical expenses (before percentage limit) 5,000itemized deductions other than medical 5,5002015 potential standard deduction 6,300in 2016, gregory receives a reimbursement for last year's medical expenses of $1,200. as a result, gregory must

Until recently, hamburgers at the city sports arena cost $4.70 each. the food concessionaire sold an average of 13 comma 000 hamburgers on game night. when the price was raised to $5.40, hamburger sales dropped off to an average of 6 comma 000 per night. (a) assuming a linear demand curve, find the price of a hamburger that will maximize the nightly hamburger revenue. (b) if the concessionaire had fixed costs of $1 comma 500 per night and the variable cost is $0.60 per hamburger, find the price of a hamburger that will maximize the nightly hamburger profit.