21. Rick's Hairstyling Salon is an established hair salon, been in the business for over 50 years. The overhead budget for the December month is as follows: 70 clients $ 280 420 Activity level Variable overhead costs: Hairstyling Supplies Laundry Fixed overhead costs: Liability Insurance Salaries and wages Rent 105 3,150 2,540 Total overhead cost $6,405 The Inn's variable overhead costs are driven by the number of guests. What would be the total budgeted overhead cost for a month if the activity level is 80 guests? a) $7,693.90 b) $8,402.00 c) $6,595.00 d) $7,739.00