You are developing a performance progress report for a project you are managing. The following time$-$phased budget was developed earlier in the planning stage and is being used as the standard against which the project performance is measured.

$\backslash$table$[[$Work Packages,W$1,$W$2,$W$3,$W$4,$W$5,$W$6,$W$7,$W$8,$W$9,$W$10,$W$11],[$A$,2,7,5,,,,,,,,],[$B$,,,,4,8,8,,,,,],[$C$,,,,,,,8,3,4,10,6],[$Total$,2,7,5,4,8,8,8,3,4,10,6]]$

You are analyzing the project performance at the end of Week $8.$ Activity $"C"$ is $20\%$ complete and its actual cost is $9.$ What is the Cost Performance Index of this activity?

Use two decimal places in your calculations.