Problem 369
The Sewing Supplies Problem. The seamstress purchased 2.4 meters of 
3.90 per meter, 7.5 meter at 
0.25 per meter, and two spools of thread at 
10.50 per hour for sewing, how many hours must she work to pay these supplies?
Solution
a. Total she spent = 2.4 * 1.9 + 5.4 * 3.9 + 7.5 * 4.95 + 25.20 * 0.25 + 2 * 0.70
= 
70.45
b. She would have to work:
70.45 / 10.50 = 6.71 or we can say she needs to work around 7 hours to pay for these supplies.