Final answer:
The total cost of basketball shoes for Aunt Ginny's triplets is $117, calculated by multiplying the price per pair, $39, by the number of triplets, which is 3.
Step-by-step explanation:
To calculate the cost of basketball shoes for all three triplets, we need to multiply the price per pair by the number of pairs required. With the regular price for basketball shoes being $39 per pair, we have the following calculation:
Cost for one pair: $39
Number of triplets: 3
Total cost = Cost for one pair × Number of triplets
Total cost = $39 × 3
Total cost = $117
Therefore, the cost of shoes for all three triplets is $117.