See the pattern here
$3.25 $4.05
$7.80 $11.20
$13.40 $16
$6 $12
$9.50 $12
$4.65
$2.35 $3.05
$2.05 $3.25
$7.50 $8.90
$7.10 $8.40
$8.40
$10.50 $13.10
$12.10
$11.70
$6.10 $9.30
$8.10 $11.70
$4.40 $5.60
$2.15 $2.80
$6
$2.40 $3.05