E18-9 XLS Compute break-even point LO 5,6), AP The Green Acres Inn is trying to determine its break-even point. The inn has 50 rooms that it rents at $60 a night. Operating costs are as follows. Salaries S6,200 per month ls $1,100 per month Depreciation S1,000 per month Maintenance S100 per month Maid service S11 per room Other costs $28 per room Instructions Determine the inn's break-even point in (a) number of rented rooms per month and (b) dollars