YOU don't earn 100% profit, $2000 in a Ltd company.
The limited company earns profit. You may earn a salary as an employee of the ltd company, you may receive dividends, based on the company's profit, as a shareholder of the limited company.
If the company incurs allowable expenses in carrying out its business, the company can offset those expenses against it's income to reach the profit figure. Generally receipts would be needed to evidence those expenses.
If you personally incur expenses that are not expenses of the business, you are responsible for paying them. The company can lend you the money to pay them, if you are a director, through a director's loan. There may be tax implications.
You need to speak to an accountant.