To find the price per inch of the ribbon, we first need to convert the length from feet to inches.
Since there are 12 inches in a foot, a 4-foot piece of ribbon can be calculated in inches as follows:
\[ 4 \text{ feet} \times 12 \text{ inches/foot} = 48 \text{ inches} \]
Now, knowing that the total cost of the ribbon is $6.24, we can find the price per inch by dividing the total cost by the number of inches:
\[ \text{Price per inch} = \frac{6.24 \text{ dollars}}{48 \text{ inches}} \]
Calculating this gives:
\[ \text{Price per inch} = 0.13 \text{ dollars/inch} \]
Thus, the price per inch of the ribbon is $0.13.