Answer:
The correct unit price can be calculated by dividing the total price paid by 84 that was the number of pairs of padded work gloves that were bought:
$102.48/84=$1.22
The correct unit price is $1.22.
-The error is that the person calculated the unit price by dividing the total price paid by 7 but the statement indicates that the contractor purchased 7 dozen pairs, which means: 7*12= 84. According to this, the contractor purchased 84 pairs of padded work gloves.