(solution) I cannot get the collected part for May sales. I looked around

(solution) I cannot get the collected part for May sales. I looked around

I cannot get the collected part for May sales. I looked around the internet but it still shows up as incorrect. I’m not sure if there is something wrong with my excel? 

Problem 21(6)-4A
Name: Jacqueline Ortiz
Section: 1498
Score: 97%
Key Code: [Key code here] Instructions Answers are entered in the cells with gray backgrounds.
Cells with non-gray backgrounds are protected and cannot be edited.
An asterisk (*) will appear to the right of an incorrect entry. The essay answer will not be graded.
Enter a zero in cells you would otherwise leave blank.
1.
SONOMA HOUSEWARES INC.
Cash Budget
For the Three Months Ending July 31, 2016
June May Estimated cash receipts from:
Cash sales $ 8,600 $ 9,000 July
$ 9,500