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?
Step-by-step reasoning:
13140
He takes pictures for 3 * 365 = 1095 days.

So he takes 10 * 1095 = 10,950 pictures.

That means he needs 10950 / 50 = 219 memory cards.

So he spends 219 * 60 = $13140 on memory cards.

.

The final answer: 13140