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The table below shows the commission charged when one buys postal orders.
Wangeci wanted to send sh 700 by postal orders. Which one of the postal order combinations given below should she buy in order to pay the least commission?
A. Sh 400+sh 300
B. Sh 400+sh 100+sh 100+sh 100
C. Sh 300+sh 300+sh 100
D. Sh 200+sh 200+sh 200+sh 100