The ABC Company manufactures two electrical products: air conditioners and water heaters. Each air conditioner takes 3 hours of wiring and 2 hours of assembling. Meanwhile, each water heater must go through 2 hours of wiring and 1 hour of assembling. During the next production period, 240 hours of wiring time are available and 140 hours of assembling may be used. Each air conditioner sold yields a profit of RM25. Each water heater sold for a RM15 profit. Calculate the best combination of air conditioners and heaters that yields highest profit using liner programming method.

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