QUESTION $20$

Mark sells goods at a gross profit margin of $30\%.$ Which of the following statements is true?

A$.$ Goods sold for $800$ will have cost Mark $320.$

B$.$ Goods sold for $800$ will have cost Mark $392.$

C$.$ Goods sold for $800$ will have cost Mark $240.$

D$.$ Goods sold for $800$ will have cost Mark $560.$