A company manufactures and sells two models of lamps `L_1` and `L_2`, the profit being ₹ 15 and ₹ 10 respectively. The process involves two workers `W_1` and `W_2` who are available for this kind of work 100 hours and 80 hours per month respectively, `W_1` assembles,`L_1` in 20 and L_2 in 30 minutes.W_2 [aomts L_1 in 20 and L-2 in 10 minutes. Assuming that all lamps made can be sold, formulate the LPP for determining the productions figures for maximum proft.