David bought 4 toys with the average cost of $8. If David also buys the fifth toy with the price of $ 10, what is the average (arithmetic mean) price of those 5 toys?	Choose one:
A) $5	B) $6	C) $8.4	D) $10	E) $11
4 toys -&gt; Total cost = 4 * Avg cost = 4*8= 
<gadget id="calculator">4*8</gadget>
<output>32</output>
32   Fifth toy cost= 10   Total cost for 5 toys= 32+10= 
<gadget id="calculator">32+10</gadget>
<output>42</output>
42   AM= 42/5= 
<gadget id="calculator">42/5</gadget>
<output>42/5 = around 8.4</output>
8.4   Hence $8.4
<result>C</result>
David bought 4 toys with the average cost of $8. If David also buys the fifth toy with the price of $ 10, what is the average (arithmetic mean) price of those 5 toys?