Of the following sets of accounting entries, which one correctly records the purchase of a piece of equipment? A : a $15,000 increase in cash and a $15,000 decrease in equipment, both entered on the same date B : a $5,000 decrease in cash, a $15,000 increase in notes payable, and a $20,000 increase in equipment, all entered on the same date C : a $14,000 decrease in cash, a $4,000 increase in notes payable, and a $10,000 increase in equipment, all entered on the same date D : a $16,000 decrease in notes payable and a $16,000 increase in equipment, both entered on the same date