In a store, the total price for 20 shirts is $360 and the total price for 45 sweaters is $900. By how much does the average (arithmetic mean) price of a sweater exceed that of a shirt in this store?  Choose the correct choice from the following answers:
A) $1 B) $2 C) $3 D) $4 E) $5
The average price of a shirt is: $360 / 20= 
<gadget id="calculator">360 / 20</gadget>
<output>18</output>
$18.   The average price of a sweater is: $900 / 45= 
<gadget id="calculator">900 / 45</gadget>
<output>20</output>
$20.   The difference in price is: $20 - $18 = $2.   The answer is $2.  20 -  18= 
<gadget id="calculator">  20 -  18</gadget>
<output>2</output>
$2.   The answer is $2.
<result>B</result>
In a store, the total price for 20 shirts is $360 and the total price for 45 sweaters is $900. By how much does the average (arithmetic mean) price of a sweater exceed that of a shirt in this store?