Answer:
25%
Explanation:
Amount Kedwin has for the purchase = $150
Total cost of purchase :
Item cost =. $175
Shipping cost = 0.1 * 175 = 17.5
Total cost =. $(175 + 17.5) = $192.5
Smallest sale rate in other to afford the item:
At 10%
(1 - 0.1) * 192.5 = $173.25
At 20%
(1 - 0.2) * 192.5 = $154
At 25%
(1 - 0.25) * 192.5 = $144.375
Hence, smallest sale rate needwd is 25%