Human: James buys 3 dirt bikes for $150 each and 4 off-road vehicles for $300 each. It also cost him $25 to register each of these. How much did he pay for everything? Assistant: 
How much did the dirtbikes cost? ** The dirtbikes cost 3*150=$<<3*150=450>>450
How much did the off-road vehicles cost? ** The off-road vehicles cost 300*4=$<<300*4=1200>>1200
How many vehicles did James register? ** He had to register 3+4=<<3+4=7>>7 vehicles
How much did registration cost? ** That means registration cost 25*7=$<<25*7=175>>175
How much did James pay for everything? ** So the total cost of everything was 450+1200+175=$<<450+1200+175=1825>>1825
#### 1825