How much money to take to Cuba?

Hi, going to Cuba next month. I can get Canadian dollars without a charge, and the material recommends $500 a week, and our trip is 2 weeks. That sounds like a lot of cash, as most of the trip is pre-paid. Anyone have recent experience in Cuba that can give some feedback? I don't plan to buy art, or anything more than food, drink, and small art and crafts. I was there four years ago, and came back with money, so just wondered if things were more expensive, etc. 

Thanks, Marge