A crew of 3 masons and 1 laborer work 8 hours a day for 3 days and 10 hours a day for 2 days in one workweek. During this time the crew has performed at a rate of 0.186 LH/sf of wall. A mason makes $34.25 per hour and a laborer makes $25.60 per hour. The local labor laws dictate overtime pay at time and a half after 8 hours have been worked in a given day. What is the labor cost per sf of wall?