Solve the problem.

You can work a total of no more than 10 hours each week at your two jobs. House cleaning pays Php 50 per hour and your sales job pays Php 80 per hour. You need to earn at least Php 560 each week to pay your bills.

Questions:
1. Can you do 4 hours for house cleaning and 5 hours for sales jobs and can you still earn more than Php 560?
2. Can you earn more than 560 if you do 1 hour of house cleaning and 6 hours for sales job?
3. Will you still earn more than Php 560 if you choose the work for 3 hours of house cleaning and 4 hours of sales job?​