Whats the answer?

You plan to travel in Europe this summer. If you do, you won't be able to take your usual summer job that pays $9,000 for the summer. To be near your summer job, you would have to rent an apartment that costs $2,200 for the summer. The cost of transportation is $1,000, visas cost $200, and hotel expenses are $1,200. What is the opportunity cost of your plan to travel in Europe? . . . . . Your opportunity cost is what you would have purchased with $ if you did not go to Europe