Bob is a sole trader. He has calculated a cost of sales figure for the year, which is $342,000. Bob received a payment of $8,030 into the business bank account for goods sold on a special deal to Harry and this amount has been included within sales. The figure of $8,030 was calculated by adding a mark-up of 10% to the cost of the goods. His gross profit percentage on all other goods sold was 20% of sales. What is the total figure of sales for the year? A. $401,640 B. $402,370 C. $418,375 D. $426,405