Count number of projects that meet multiple criteria found in different spread sheets

Hi everyone,

Any help would be greatly appreciated as I have been struggling with this project for quite some time now. The questions I am trying to answer are:

1. How many PM Projects of type "Purchase", with a Customer SREC Contract, located in Massachusetts, in Active status, and have an age greater than 200 do not have an associated SREC Registry Unit?

2. What is the sum of the system sizes of these systems?

The rules are:
USE ONLY IN-CELL FORMULAS. DO NOT USE ANY TASK BAR FUNCTIONS (TEXT TO COLUMNS, REMOVE DUPLICATES, ETC.)

This is what I have so far and it is not working for me at all:
=SUMPRODUCT((PM[Customer Name]="purchase")*(Sales[BILLINGSTATE__C]="MA")*(Contract[CONTRACT_TYPE__C]="Active"))Excel Questions.xlsx

I have attached the workbook here.

Thanks in advance for reading and helping!