i put 668 for Q17 but it was wrong :( thank you for helping me

The following table gives the precedence requirements, normal and crash activity time, and normal and crash costs for a project. Crash time is the shortest possible activity time and crash cost is the cost associated with the crash time. (Activity C can't be crashed) Activity Predecessors Normal Normal Crash time Crash costs Crash costs /day time (days) costs (S) (days) (S) (S) A None 20 320 15 570 ? None 16 480 13 600 ? C None 12. 290 NA ? D AB 20 250 10 330 ? 18 340 15 700 F BE 14 600 12 900 2 B NA E Question 13 2 pts What is the critical path of the project? Start-A-D-End Start-B-D-End O Start-B-F-End Start-C-E-F-End Question 14 2 pts What is the duration of the project (using normal time)? Report an integer. 100 Question 16 5 pts We want to shorten the duration of the whole project to 39 days while minimizing the total costs. To minimize the cost, you would crash Afor Select] days B for [Select] days D for (Select) days . E for (Select) days Ffor Select days Question 17 2 pts What will be the new cost of the project when the duration is shortened to 39 days? Report an integer without the comma