Response to the following questions:
1. For each of the following errors, indicate whether the error would cause the accounting equation to be out of balance, and if so, indicate how it would be out of balance.
(a) The purchase of land for $50,000 cash was recorded as an increase in land of $50,000 and a decrease in cash of $5,000.
(b) The receipt of $7,500 for fees earned was recorded as an increase in cash of $7,500 and an increase in liabilities of $7,500.
2. What is a primary control for determining the accuracy of a business's record keeping?