164 square meters and 139 square meters. What's the price difference for a year?

Suppose the property fee is X yuan per square meter per month. Then a house of 164 square meters needs to pay the property fee of164x12 =1968x every year; 139 square meters, the annual property fee is139 x12 =1668 x; The difference between them is 1968X- 1668X=300X. It depends on the monthly property price per square meter. If it is per square meter per month 1 yuan, the difference is 300 yuan; If it is 5 yuan per square meter per month, the difference is 1500 yuan, and so on.