Final answer:
Saul will receive $40.80 for the socks he is able to knit from the 8 balls of yarn.
Step-by-step explanation:
To find out how many pairs of socks Saul can knit from the 8 balls of yarn, we need to find the total amount of yarn he has. We know that 4/5 of a ball of yarn is used to knit 1 pair of socks. So, the total amount of yarn he has is 4/5 * 8 = 32/5 balls of yarn.
Now, to find out how much money Saul will receive for the socks, we multiply the number of pairs of socks by the selling price per pair. Since each pair is sold for $12.75, the total amount of money Saul will receive is (32/5) * 12.75 = 204/5 dollars, which is equal to $40.80.
Therefore, Saul will receive $40.80 for the socks he is able to knit from the 8 balls of yarn.