the third week?

AB $-$ Part $2$

A project consists of $3$ tasks. Task $A$ is scheduled to begin at the start of Week $1$ and finish at the end of Week $4.$ Task B is scheduled to begin at the start of Week $1$ and finish at the end of Week $2.$ Task C is scheduled to begin at the start of Week $3$ and end at the end of Week $4.$ The budgeted cost for Task A is $$120,000,$ for Task B is $$95,000,$ for Task C is $$77,000.$ At the end of the third week, Task A is $80\%$ complete, Task B is $100\%$ complete, Task C is $40\%$ complete. What is the SPI for the project at the end of the third week?