Try another version of this question
You have one type of chocolate that sells for $1.80/lb and another type of chocolate that sells for $9.70/lb.
You would like to have 63.2 lbs of a chocolate mixture that sells for $4.70/lb.
How much of each chocolate will you need to obtain the desired mixture?
You will need
lbs of the cheaper chocolate
and
lbs of the expensive chocolate. 40
23.2