$6.50 $13.10
See the pattern here
$15.90
$3.15 $4.05
$8.70 $11.20
$16
$6 $12
$9.40 $12
$3.70 $4.65
$3.05
$1.55 $3.25
$5.90 $8.90
$6.20 $8.40
$8.40
$10 $13.10
$6.90 $12.10
$8.10 $11.70
$7.20 $9.30
$9.80 $11.70