Sandra operates a nail salon. She is trying to plan her costs for the next month and is uncertain as to how to estimate those costs. Help her estimate next month's costs given the following information she collected, based on number of customers per month. Nail supplies Equipment Rental Electricity Total Number of Customers 1600 1300 $3900 $5670 2500 2500 1890 $4800 418 2500 300 $6700 $8588 $7660 360 1130 $3390 2500 266 $6156 If Sandra believes next month is going to be busier than the last few months and she expects 1940 customers (relevant range is 1,000- 2,000 customers per month), what is the expected cost for electricity?