In the first method, the customer (buyer) registers a call for a consultation with the engineering team by calling, indicating the address, phone number and the time during which the engineering team should arrive at the specified address. The consultation service operates from Monday to Saturday from 11:00 to 18:00 and is a paid service. In the second method, the customer (buyer) himself approaches the store for consultation. Consultation with the engineering team in the store is a free service and operates from Monday to Saturday from 10:00 to 19:00.