C# C# C# Windows Forms

Set up tasks. The car owner ordered the following program. When a car repair only begins its activity, the owner usually wants to get the greatest income, which he plans to increase at the expense of additional services. There will be a small coffee on the car. But, at the same time, he can hire only one worker to the post of the casher, and because
The purpose of the program is the account of the sale of gasoline and the range of goods in the minicraft.
Requirements for the task:
For convenience the window is divided into three parts: the first for implementation calculated, directly related to the fuel supply of cars; the second - purchases in mini-cafe; the third part for calculating the amount of payment.

In the task also is used parsing fuel prices from the site of a certain supply.