I'm trying to do nested IF's, when I run each if statement seperately they work fine, but when I merge them into one line of code they give me #Value error. Any help would be appreciated!

Here's the 3 specific lines:

=IF('Requestor Information'!E28"",'Requestor Information'!E28)

=IF(AND(C50,'Requestor Information'!G35="Yes"),SUM('Requestor Information'!E28+7+3))

=IF(AND(C50,(OR('Requestor Information'!G35="No",'Requestor Information'!G35=""))),SUM('Requestor Information'!E28+7+1))


Putting them together --
=IF('Requestor Information'!E28"",'Requestor Information'!E28),IF(AND(C50,'Requestor Information'!G35="Yes"),SUM('Requestor Information'!E28+7+3)),IF(AND(C50,(OR('Requestor Information'!G35="No",'Requestor Information'!G35=""))),SUM('Requestor Information'!E28+7+1))

I also want to add another bit of code that says if any of the numbers returned are 10 then the cell will = 10... I haven't even looked at that yet until I can get the other problem resolved!!!