 
<translate> Ya sayi su a 12 *.75 = $9. Ya sayar da su a 12 * 1.5 = $ 18. Saboda haka yana samun 18 - 9 = $9 a rana. Wannan yana nufin yana samun 9 * 7 = $63 a mako. Amsar ƙarshe: 63. <eng> He buys them for 12 * .75 = $9. He sells them for 12 * 1.5 = $18. So he makes 18 - 9 = $9 per day. That means he makes 9 * 7 = $63 per week.
The final answer: 63. 