Cash account can be classified as a real account. A real account is an account that retains and rolls forward its ending balance from period to period. The areas in the balance sheet in which real accounts are found are assets, liabilities, and equity.
Net income equal to Revenues minus Expenses. Revenue is the income generated before any expenses are taken out. Therefore, when a company is said to have "top-line growth," the company's revenue is growing. Revenue is also called net sales which is revenue minus any returns of purchased merchandise.
Payment of expenses will reduce the assets. When an expense is recorded at the same time it is paid for with cash, the cash (asset) account declines, while the amount of the expense reduces the retained earnings account.