Meredith Grey is a regional sales representative for Dental Laboratories, Inc., a company that sells alloys created from gold, silver, platinum, and other precious metals to several dental laboratories in Washington, Oregon, and Idaho. Grey's goal is to maximize total monthly commission income, which is figured at 8 percent of gross sales. In reviewing monthly experience over the past year, Grey found the following relations between days spent in each state and monthly sales generated:

A. Construct a table showing Grey's marginal sales per day in each state.
B. If administrative duties limit Grey to only ten selling days per month, how should they be spent to maximize commission income?
C. Calculate Grey's maximum monthly commissionincome.

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Washington Oregon Idaho ross GrosS GrosS DavsSales Das Sales Das Sales SO $6,250 8,750 12,500 2 37,500 2 16,250 2 17,500 21,250 23,750 25,000 6 62,500 6 30,000 6 25,000 762,500 7 31,250 7 25,000 $10,0000 25,000 1 47,500 322,500 3 55,000 4 26,250 4 60,000 5 28 ,750 5