ANSWER
$339.86
EXPLANATION
We have that Joey makes $6.75 per hour plus 8% commission on all sales.
Joey works 38 hours.
That means that in those hours he made:
Amount = 6.75 * 38 = $256.50
He made $1042 worth of sales.
This means that he also made 8% of $1042.
That is :
[tex]\text{Amount = }\frac{8}{100}\cdot1042\text{ = \$83.36}[/tex]Therefore, the total amount of money that he made is the sum of the two amounts:
Total amount = $256.50 + $83.36
Total amount = $339.86
He made a total of $339.86