Calculate the added margin from the information below. Show calculation. It should be around 7.08%, but I'm not sure how to calculate answer.

Exhibit 1
Units or SF of Rentable Space	50,000
Gross Purchase Price	9,400,000
Depreciable Base	9,400,000
Depreciable Life	39
Estimated Sales Price	13,300,000
Expected Year of Sale	10
Cash Flow from Operations (CFO)	788,300
Annual Increase in CFO	4%
Leasehold Payments (annual)	70,000
Equity Investment	2,400,000
Amount of 1st Mortgage	7,000,000
Interest Rate	7.50%
Term of Loan	10
Amortization Period	25
Constant Loan Payments	8.97%
Exhibit 2
Vacancy Rate	0.07
Potential Gross Income (PGI)	1,275,000.00
-Vacancies	(89,250.00)
Effective Gross Income (EGI)	1,185,750.00
-Real Estate Taxes	(127,500.00)
-Other Operating Expenses	(254,950.00)
-Capital Reserves (aka Replacement Reserves)	(15,000.00)
Cash Flow from Operations (CFO) (aka NOI)	788,300.00
-Finance Payments	(627,974.70)
-Lease Payments	(70,000.00)
BTCF	90,325.30
Exhibit 3
Price/Unit or Price/Rentable SF	188
Real Estate Taxes/Gross Revenue	10%
Other Operating Exp/Unit or SF	5.10
Other Operating Exp/Gross Rev	20.00%
RE Taxes and Op Exp/Unit or SF	7.65
Average Monthly Rents or Yearly Dollars	25.50
Actual or Projected Occupancy	93%
Added Margin	??