Penny Davis runs the Shear Beauty Salon near a college campus. Several months ago, Penny used some unused space at the back of the salon and bought two used tanning beds. She hired a receptionist and kept the salon open for extended hours each week so that tanning clients would be able to use the benefits of their tanning packages. After three months, Penny wanted additional information on the costs of the tanning area. She accumulated the following data on four accounts:

		Wages		Supplies and Maintenance		Equipment Depreciation		Electricity		Tanning Minutes		Number of Visits
January		$1,786		$1,464		$150		$356		4,134		417
February		1,743		1,881		150		417		3,963		369
March		1,812		4,107		150		717		6,852		558

Penny decided that wages and equipment depreciation were fixed. She thought supplies and maintenance would vary with the number of tanning visits and that electricity would vary with the number of tanning minutes.

1. Calculate the average account balance for each account. Calculate the average monthly amount for each of the two drivers. (Round all answers to the nearest dollar or the nearest whole unit.) Use your rounded answers in all subsequent computations.

Express the results in the form of an equation for total cost. (Round to the nearest cent.) Cost=$+$(visit)+$(minute) 3. In April, Penny predicts there will be 372 visits for a total of 3,780 minutes. What is the total cost for April? If required, round your answer to the nearest dollar. 4. Suppose that Penny decides to buy a new tanning bed at the beginning of April for $7,440. The tanning bed is expected to last four years and will have no salvage value the end of that time. What will be the new equation for total cost? If required, round your answers to the nearest cent. Cost=$+$(visit)+$(minute)