
Asok B. answered 09/22/15
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Ph. D in Biochemistry, willing to teach Chemistry, Biochemistry, Math
if X be the total sales $ then 10% of X=10/100 X= X/10
with 5% commission earnings= 250 + 5/100 X
Thus, X/10= x/20 +250
.1 X- 0.05 X= 250
0.05 X= 250
x= 250/0.05= 5000
Total sales must be $ 5000.