Purchasing power of social commodities: refers to the currency payment ability used by various aspects of society to purchase goods during a certain period of time, reflecting the demand for goods and market capacity of the society in this period. Since purchasing power refers to the ability to purchase goods, everything is not The physical receipts and payments settled by currency and monetary expenditures that are not used to purchase goods and services are outside the scope of social purchasing power. Which of the following items belong to the purchasing power of social goods:. ['Xiao Li pays a party fee of 78 yuan per month on time.', 'Xiaosun receives 3,000 yuan salary from the company every month.', 'Xiao Wang deducts a part of the monthly salary for personal income tax.', 'Xiao Zhang borrowed 4,000 yuan from Xiao Liu to buy a computer in the first half of the year. He returned the loan to Xiao Liu this month.']