Answer :
22.50 per hr for 4.5 hrs = 101.25...work pay
35 miles at 0.50 per mile = 0.50(35) = 17.50...travel pay
parts : 350 * 1.05 = 367.50...parts and taxes
total : 101.25 + 17.50 + 367.50 = 486.25
486.25 - 468.75 = 17.50.
answer is : The invoice is incorrect....he did not charge for travel <==
35 miles at 0.50 per mile = 0.50(35) = 17.50...travel pay
parts : 350 * 1.05 = 367.50...parts and taxes
total : 101.25 + 17.50 + 367.50 = 486.25
486.25 - 468.75 = 17.50.
answer is : The invoice is incorrect....he did not charge for travel <==