Mack's guitar fabrication shop produces lowcost, highly durable guitars for beginners.Typically, out of the 100 guitars that begin production eachmonth, only 82 percent are considered good enough to sell. The other 18 percent are scrapped due to quality problems that are identified after they have completed the production process. Each guitar sells for $250. Because some of the production process isautomated, each guitar only requires 12 labor hours. Each employee works an average of 160 hours permonth. Labor is paid at $9 perhour, materials cost is $42 perguitar, and overhead is $3800.Whatis the labor productivity ratio forMack's guitar fabrication shop?