1

The cost of mobile phones of six

different brands are $100, $130, $110,

$120, $201, $150. 

The range of costs of mobile phones is:

$101.

2

The price of a telescope is at different

shop is $89, $76, $90, $78, $96.

The range of price of different telescope is : $20.

3

The price books on different subjects are

$10, $13, $15, $17, $20

The price range of the umbrellas is: $10.