Roses can be purchased individually for $6.30, one dozen for $36, or two dozen for $50. What is the greatest number of roses that can be purchased for $680?  Options
A) 156	B) 162	C) 316	D) 324	E) 325
Buy as many $50 deals as possible. We can by   650/50= 
<gadget id="calculator">  650/50</gadget>
<output>13</output>
13 two dozen roses, thus total of 13*24= 
<gadget id="calculator">13*24</gadget>
<output>312</output>
312 roses.   We are left with   680 - 650= 
<gadget id="calculator">  680 - 650</gadget>
<output>30</output>
$30. We can buy 30/6.3= ~4 roses for that amount.   Total = 312 + 4= 
<gadget id="calculator">312 + 4</gadget>
<output>316</output>
316.   Answer: 316.
<result>C</result>
Roses can be purchased individually for $6.30, one dozen for $36, or two dozen for $50. What is the greatest number of roses that can be purchased for $680?