please explain why this is the answer

2 out of 2 point CRE Multi-tenant Office Investment. (Purchase Price = 10,000,000; Acquisition Cost = 30,000; Land Value = 2,500,000; Land Improvements = 500,000; 7-yr Property 2,000,000; Bullet Loan 7,000,000; Interest Rate = 5%; Points = 2; Term = 7 years; NOI Year 3 = 800,000; CAPEX Year 3 = 75,000; Net Sale Price Year 7 = 12,000,000; Sum of Depreciation - 3,750,000; Sum of CAPEX= 450,000;) What your adjusted basis at time of sale? Selected Answer: 6,730,000 Answers: 6,730,000 7,770,000 8,180,000 9,070,000 10,000,000 10,030,000