To find the average pay for the swing shift workers, we need to add 1/12 of the average pay for the day shift workers to the average pay for the day shift workers.
1/12 of $18.36 = $1.53
$18.36 + $1.53 = ${data-answer}lt;<18.36+1.53=19.89>>19.89
Therefore, the average pay for the swing shift workers is $19.89 per hour.