A factory makes tables and chairs. Each table requires 100 labor-hours of carpentry, 80 labor-hours of assembly and 50 labor-hours of painting. Each chairs requires 60 labor-hours of carpentry, 80 labor- hours of assembly and 90 labor-hours of painting. Each table sells for RM90 and Each chair sells for RM75. In every month, there are altogether 800 labor-hours available for carpentry, 720 labor-hours available for assembly, and 700 labor-hours available for painting. Determine the monthly production rate of the tables and chairs (which decimal answers are allowed) such that maximum monthly revenue may be generated. Also state such maximum revenue