To join a well-known ten-yuan boutique brand, the franchisee must pay the joining fee to the brand headquarters, which is about 5,000 yuan. At the same time, franchisees also need to pay a deposit of 6,543,800 yuan to the head office. After the contract is terminated, the head office will give a full refund. Suppose an investor opens a 40-square-meter 10 yuan store in a county-level city, which is located near an ordinary intersection, and the rental cost is about 2000 yuan/month; The decoration cost is 8,000 yuan (the decoration cost is calculated by 400 yuan/square meter); The equipment purchase fee needs 20,000 yuan; The first batch of purchase money needs 30 thousand yuan; Promotion and opening expenses need 2000 yuan; Personnel salary is 2000 yuan/month (equipped with 1 person. If a couple opens a shop, it can save personnel expenses); Water and electricity miscellaneous fees 500 yuan/month. What is the investment cost of the ten-dollar store? According to this calculation, to open a 10 yuan store, investors need to prepare at least 79,500 yuan of start-up capital. The data are for reference only, subject to the actual situation.