Paul worked 43 hours at a rate of $7.25 for straight time (40 hours) and time-and-a-half for overtime. What was his total pay?

Paul worked 40 hours of his regular pay. 
(40 x 7.25 = $290)

Paul worked 3 hours of time and a half.
(3 x 7.25 + 3.625 (half of 7.25) = 10.875)
So 3 x 10.875 = $32.625

$32.625 + $290.00 = $322.62