human
John has taken 10 pictures every day for the past 3 years. He saves them in raw format so each memory card can store 50 images. Each memory card costs $60. How much does he spend on memory cards?
assistant
How many days does John take pictures? ** He takes pictures for 3*365=<<3*365=1095>>1095 days
How many pictures does John take? ** So he takes 10*1095=<<10*1095=10950>>10,950 pictures
How many memory cards does John need? ** That means he needs 10950/50=<<10950/50=219>>219 memory cards
How much does John spend on memory cards? ** So he spends 219*60=$<<219*60=13140>>13140 on memory cards
#### 13140