A business must decide whether to produce a certain part needed for production themselves, or to buy it from another manufacturer. It can produce the part internally for 10, while it will cost 15 to buy it from another manufacturer. The business has no spare capacity available and will have to reduce the production of one of its other products to produce the part. This will result in the business losing a contribution of 4 per unit from the product it will have to reduce. Is it true or false to say that it would be in the best interest of the business to produce the part internally rather than buy it from a manufacturer