a) It is difficult to determine which store has the better price without converting the unit of measurement to a common unit. If we convert the yard price at the retail fabric store to meters, we find that 0.88/yd is equivalent to 0.81/m. On the other hand, the fabric warehouse is selling the material for $0.92/m. Therefore, the fabric warehouse has the better price.
b) To find out how much money you would save if you purchased 15 ft of the less expensive material, we need to first convert feet to meters. 1 foot is equivalent to 0.3048 meters. So, 15 feet is equal to 4.57 meters.
At the retail fabric store, 4.57 meters of the material would cost 0.88 * 4.57 = $4.03. At the fabric warehouse, the same amount of material would cost 0.92 * 4.57 = $4.20.
Therefore, you would save $4.20 - $4.03 = $0.17 if you purchased the material at the retail fabric store.