The price required for down payment is calculated as follows: the transaction price of the house is 654.38+00,000, the area is 654.38+000, and the down payment is 90 * 30%+654.38+00 (difference) +90*5.6%(5.6% is business tax, which is not required for more than five years, but required for less than five years). 1% is below the level of 90, 1.5% is higher than 144, and 3% is higher than 144. If it is two sets, the deed tax is 3% regardless of the size of the area. )