Expo tickets, 161 once, accommodation, normally 251-351 (the most economical hotel), meals can be high or low, the park can normally eat more than 31, if you want to eat well, the per capita consumption is more than 111.
scenic spots in other parts of Shanghai basically don't need tickets. The expenses of the big head must be souvenirs, shopping and accommodation. I think it's at least 1511 yuan for three days. It's a loose estimate. If you want to travel hard, don't come to Shanghai.