Question 911741
total sold 146
total sales 1065
product sold at 7.5 and 7
c+a=146,
7.5*c+7*a=1065
c=146-a
We have two equations with two variables.
We will substitute to make one equation with one variable
7.5*(146-a)+7*a=1065
1095.0-7.5a+7*a=1065
-0.5*a=-30.0
a=60.0
c=146-a
c=86 at $7.50 and  a=60 at $7
check
86+60=146
7.5*c+7*a=1065
7.5*86+7*60=1065
645.0+420=1065
1065.0=1065
ok
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