Dave is a sole proprietor. During this year, he earned $300,000 profit from his business. He had no other source of income. Compute total self employment Social security Medicare + and self-employment tax deduction Round up if the number you get has 50 or more (ie, 2.50 - 3) Round down if the number you get has less than .50 (ie, 2.49 - 2) DO NOT use decimals DO NOT use $ DO NOT use