A tailor stitches 4 shirts everyday. It takes him 3 hours to stitch a shirt. Each shirt uses 10 buttons and has two pockets. Each shirt costs the tailor $ 2 and he charges the customer $ 5 .  1. How many pockets does the tailor stitch in 39 days?   2. How many shirts does the tailor stitch if he uses 300 buttons?   3. How many dollars does the tailor collect from his customers in 7 days?   4. How many dollars does the tailor earn as profit in 15 days?   5. How many hours does the tailor work in 12 days?