Bart busks with 3 friends whilst selling CD copies of his own music. They make a total of $52 from busking and decide to split it evenly. Bart makes an additional amount by selling 5 CDs at $15 each. If Bart pays a permit of $15, what is the total amount he earns?

First, we need to calculate how much each person earns from the busking.

Total amount earned from busking = $52
Number of people sharing the earnings = 4 (Bart and 3 friends)
Amount each person earns from busking = $52 / 4 = $13

Now, we need to calculate how much Bart earns from selling CDs.

Number of CDs sold = 5
Price per CD = $15
Total amount earned from selling CDs = 5 * $15 = $75

Now, we need to calculate Bart's total earnings by including the amount earned from selling CDs and subtracting the permit fee.

Total earnings = Amount earned from busking + Amount earned from selling CDs - Permit fee
Total earnings = $13 + $75 - $15
Total earnings = $73

Therefore, Bart earns a total of $73.