Answer:
14 cases of soap bars.
Explanation:
In one case of soap bars there is = 150 bars
You use amount of soap bars per day = 300
You need to order to have enough for 7 days = 300 × 7 = 2100 bars
150 bars ⇒ 1 case
2100 bars ⇒
= 14 case
You need to order 14 case of soap bars for 7 days.