A salesman's income consists of a commission and a base salary of $350 per week. Over the past 5 weeks, his weekly income totals have been $406, $413, $420, $436 and $495. What must his average (arithmetic mean) commission be per week over the next two weeks so that his average weekly income is $500 over the 7-week period?	Choose the most appropriate option:
A) $315 B) $245 C) $365 D) $715 E) $730
Total weekly income over 5 weeks=$406+$413+$420+$436+$495=$2170   For avg weekly income to be $500 over 7 weeks, we need total weekly income over 7 weeks406+ 413+ 420+ 436+ 495= 
<gadget id="calculator">406+ 413+ 420+ 436+ 495</gadget>
<output>2_170</output>
$2170   For avg weekly income to be $500 over 7 weeks, we need total weekly income over 7 weeks=$3500   Now, $3500-$2170=$1330   From this, we subtract base salary for 2 weeks i.e $350*2= 
<gadget id="calculator">350*2</gadget>
<output>700</output>
$700   Therefore, commission=$1330-$700=$730 for 2 weeks   $315vg weekly commission=$315   $315nswer $315
<result>A</result>
A salesman's income consists of a commission and a base salary of $350 per week. Over the past 5 weeks, his weekly income totals have been $406, $413, $420, $436 and $495. What must his average (arithmetic mean) commission be per week over the next two weeks so that his average weekly income is $500 over the 7-week period?