A small manufacturer has employed 5 skilled men and 10 semi - skilled men and makes an article in two qualities-deluxe model and an ordinary model. The making of a deluxe model requires 2 hrs work by a skilled man and 2 hrs work by a semi skilled man. The ordinary model requires 1 hr by a skilled man and 3 hrs by a semi skilled man. By union rules, no man may work more than 8 hrs per day. The manufacture's clear profit on deluxe model is Rs.15 and an ordinary model is Rs. 10. How many of each type should be made in order to maximize his total daily profit.