Schaffer needs to report the total dollar value of all real estate sold each month to the local Board of Realtors. Input a formula into the cells in column D, starting with cell D12, that will compute a running total of sales for the month of September.

1. Property Address	Type	Sales Price	Running Total of Sales Price	Agent	Agent's Commission	% of Total Commissions
   15 Williamsburg Way	Residential	189700		M. Marx
   2034 Main Street	Commercial	219500		S. Fox
   14562 East Third Street	Commercial	125000		P. Brown
   5 Ridgemont Drive	Residential	89600		V. Pollard
   178 Parknoll Blvd.	Residential	112000		M. Marx
   17 Beaushire Lane	Residential	169000		M. Marx
   156 St. Route 47	Commercial	569000		S. Fox
   1689 Peachapple Ct.	Residential	243000		C. Bolton
   1904 Alex Dell Rd.	Commercial	879000		S. Skipp
   2 Matador Drive	Residential	320000		V. Pollard
   89 Stone Quarry Ct.	Residential	195400		M. Marx
   190 S. D Street	Commercial	196000		S. Skipp
   947 High Street	Commercial	225000		S. Fox
   39 Commercial Park Way	Commercial	176000		S. Fox