Playing with the list command

the following demonstrates the output from the print_r sttm:
Array
(
    [0] => large
    [1] => blue
    [2] => 12
)


display the array after the sort:
Array
(
    [0] => blue
    [1] => large
    [2] => 12
)

firstvalue: blue
secondvalue: large

Trying the extract command using another array named shirtInfo2
size is large; color is blue; cost is 12

Trying the extract command using another array named shirtInfo3
and formatting the cost
size is large; color is blue; cost is 12.00