Chris works for 8 hours a day, from 6 a.m. to 2 p.m., which is a total of 56 hours per week (8 hours/day x 7 days/week).
For every hour, he is paid $27 + $12.50 = $39.50.
Therefore, his total weekly pay is:
Total pay = hourly rate x number of hours worked
Total pay = $39.50/hour x 56 hours/week
Total pay = $2,212/week
So Chris' total weekly pay is $2,212 if he works from 6 a.m. to 2 p.m. for 7 days a week on explosives.