James House is planning on starting a cleaning services business but has not decided whether he should focus on residential clients or commercial clients. His estimates of revenue, variable expenses, and fixed expenses are shown below. Residential Commercial Revenue 70 per hour 80 per hour Variable expense 42 per hour 40 per hour Fixed expense $5, 600 per month $6, 560 per month Required: 1. Calculate the number of break-even hours for residential clients and commercial clients. (Round your answers to 1 decimal place.) Break-even hours for residential clients hours Break-even hours for commercial clients hours 2. Assume that James decides to focus on commercial clients and his business is operating at 190 hours per month. Calculate the margin of safety both in dollars and as a percentage of sales. (Round percentage answer to 1 decimal place.) Margin of safety (in dollars) Margin of safety as a percentage of sales