In 2009, a diabetic express company charged $39.95 for a vial of type A insulin and $30.34 for a vial of type B insulin. If a total of $2022.21 was collected for 60 vials of insulin, how many vials of each type were sold?

Answer 1

If there are x vials of A, then then the rest (60-x) are of B. So, adding up the costs, we have

39.95x + 30.34(60-x) = 2022.21

Now just solve for x and then figure 60-x.

Answer 2

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