Gator Beach Marts, a chain of convenience grocery stores in the Fort Lauderdale area, has store hours that fluctuate from month to month as the tourist trade in the community varies. The utility costs for one of the company's stores are listed below for the past six months. Total Hours Total Utility Month of Operation Cost January 500 $3,120 February 600 3,600 March 750 4,350 April 450 2,950 May 400 2,550 June 350 2,350 Required: 1-a. Use the high-low method to estimate the cost behavior for the store's utility costs. Express the cost behavior in formula form (Y= a + bx). 1-b. What is the variable utility cost per hour of operation? 3-a. Construct an Excel spreadsheet and use the Excel commands to perform a least-squares regression. Estimate the cost behavior for the store's utility cost. Express the cost behavior in formula form. 3-b. What is the variable utility cost per hour of operation? 4. During July, the store will be open 300 hours. Predict the store's total utility cost for July using each of the cost-estimation methods employed in requirements (1) and (3). Complete this question by entering your answers in the tabs below. Req 1A Req 1B Req 3A Req 3B Req 4 Use the high-low method to estimate the cost behavior for the store's utility costs. Express the cost behavior in formula form (Y = a + bx). Monthly utility cost = X < Req 1A Req 1B >