RFC Company manufactures two types of lamps: special lamp and regular lamp. Each special lamp requires 4 pounds of brass and each regular lamp requires 8 pounds of brass. During each production period, the company's brass supply is limited to 640 pounds. Each special lamp requires 6 hours of milling time in the machines and each regular lamp requires 2 hours of milling time in the machines. The company's machines are available only for 360 hours in each production period. Each special lamp requires 5 light bulbs that must be imported from Hong Kong. The importation of these bulbs is limited to 200 units. The contribution to profit of each special lamp is P400 and P360 on the regular lamp. How many units of the special lamp and regular lamp should be produced per production period in order to maximize the profit?