Samson's purchased a corner lot five years ago at a cost of $$640,000.$ The lot was recently appraised at $$820,000.$ At the time of the purchase, the company spent $$50,000$ to grade the lot and another $$4,000$ to build a small building on the lot to house a parking lot attendant who has overseen the use of the lot for daily commuter parking. The company now wants to build a new retail store on the site. The building cost is estimated at $$1\mathrm{.}5$ million. What amount should be used as the initial cash flow for this building project?