When this field is messed up, DO NOT delete it and recreate it, especially if you have already used it in the Total Expected Value of Pitches So Far report. Instead you can fix it fairly easily with these steps:

1. Click the Setup gear (upper right) and select Setup

2. Click the Object Manager tab (not the down-arrow) and select Pitch from the list of objects in the central panel

3. Click Fields & Relationships on the left-hand vertical menu

4. Click on the name Expected Value (blue) to open a page of its details

5. Click the Edit button (near the center)

6. Scroll down and clear everything out of the big formula textbox that says Expected Value (Currency) = above it

7. Copy this: "Maxz__Investment_Amount__c  *  Maxz__Closability__c" (NOT the quotes) and paste into that big empty textbox you just cleared

8. Click Save (either at the bottom or the top)

9. Re-grade by using the App Launcher to open the Grader App and follow instructions to run the scoring routine again and then be sure to reload the page to see the updated error list & grade certificate