Please help with the working:

A project manager is managing a project. The original scope baseline of the project was budgeted at $100,000. Since work on the project started there have been seventeen authorized and approved changes to the project. The changes have a value of $17,000 and the cost of investigating them prior to their approval was $2,500. What is the current budget for the project?
a. $100,000
b. $114,500
c. $117,000
d. $119,500