To find the total selling price for all the boxes of chocolate, we need to first determine how many boxes are needed to package 100 pounds of chocolate.
Each box contains 1 1/4 pounds of chocolate, which can be written as 5/4 pounds.
To find the number of boxes needed, we divide 100 pounds by 5/4 pounds per box:
100 pounds ÷ (5/4 pounds) = 100 × (4/5) = 400/5 = 80 boxes
So, 80 boxes are needed to package 100 pounds of chocolate.
Now, we can calculate the total selling price by multiplying the number of boxes
by the selling price per box:
80 boxes × $1.75 per box = 140
Therefore, the total selling price for all the boxes of chocolate is $140.