1. **State the problem:** Calculate the monthly revenue (yield) for the hair care professional under two scenarios: current average jobs and the proposal for peak and off-peak months. 2. **Given data:** - Regular price: $80 - Working days per month: 22 - Proposed low month rate: $60 - Peak months (4 months): average 18 customers daily (proposal) - Off-peak months (8 months): average 11 customers daily (proposal) - Current average jobs per day: 15 - Current peak months jobs per day: 30 - Current off-peak months jobs per day: 7 3. **Calculate current monthly revenue:** - Peak months revenue per month: $$30 \times 22 \times 80 = 52800$$ - Off-peak months revenue per month: $$7 \times 22 \times 80 = 12320$$ 4. **Calculate proposal monthly revenue:** - Peak months revenue per month: $$18 \times 22 \times 80 = 31680$$ - Off-peak months revenue per month: $$11 \times 22 \times 60 = 14520$$ 5. **Compare total yearly revenue:** - Current yearly revenue: $$4 \times 52800 + 8 \times 12320 = 211200 + 98560 = 309760$$ - Proposal yearly revenue: $$4 \times 31680 + 8 \times 14520 = 126720 + 116160 = 242880$$ 6. **Conclusion:** The current schedule yields $309760 yearly, while the proposal yields $242880 yearly. The current schedule generates higher revenue. **Final answer:** The hair care professional should maintain the current schedule for higher yearly revenue of $309760 compared to the proposal's $242880.