Lol...milk town...ok..back to work
0.08(12.99) = 1.04 --- tax on the toy
0.08(39.99) = 3.20 --- tax on the book
3.20 - 1.04 = 2.16 <== the book tax is 2.16 more then the toy tax
Find the distance of each trip:
68 km / 34 trips = 2 km per trip
Divide total distance by distance per trip:
348 km / 2 km per trip = 174 trips
Answer: 174 trips