Vuyo's guitar fabrication produces low-cost highly durable quiters for beginners typically out of the 100 guitars that begin production each month, only 70% are considered good enough to sell. The other 30%are scrapped due to quality problems that are identified after they have completed the production process.each guitar sells for R200 some of the production process is automated hence each quiter only requires 10 labour hours. Each employees works an avarage 160 hours per month. Labour is paid R10/hour, material cost is R40/guitar and overhead is R3000.

Calculate the labour productivity ratio