7. four friends went shopping at a music store. the table shows the
number of cds each friend bought and the total cost. complete the
table to show the average cost of the cds each friend bought.
friend
number of cds
purchased
total cost
(in dollars)
average cost
(in dollars)
lana
$36.72.
troy
$40.
juanita
$47.
alex
$54.