Answer:
$10000
Explanation:
Since annual means occuring once every year, you will only pay the $5000 once.
5000+__x=y
For every day you are there, it is another $100/day.
5000+100x=y
Since you are going to stay for 50 days, you input that number into x.
5000+100(50)=y
Solve
100(50)=5000
5000+5000=10000