William, a Cash-Basis Sole Proprietor, Had the Following Receipts and Disbursements

William, a cash-basis sole proprietor, had the following receipts and disbursements for 2015: For 2015, what amount should William report as net earnings from self-employment?

A) $13,400
B) $14,000
C) $15,000
D) $20,000
E) None of the above