SOLVE USING EXCEL!!!!DO NOT SOLVE BY HAND. WILL RATE .THANKS

6- An office building should last 60 years, but this owner will sell it at 20 years for 40% of its construction cost. For the first 20 years it can be 76 leased as Class A space, which is all this owner operates. When the building is sold, the land's cost will be recovered in full. $2.2M Land $4.1M Building $640,000 Annual operating and maintenance 4% Annual property taxes and insurance % of initial investment) (a) If the owner wants a 12% rate of return, what is the required monthly leasing cost