True or False. Justify your answer

Robinson works to produce one of two goods apple and carrots. Recently Robinson has begun to trade with his neighbour Friday, and both persons are adjusted to the market prices for apple and carrot and is in equilibrium. The current price for apple is $4 per unit, and the price for carrot is $12 per unit. If Robinson decides to give up producing 100 units of carrots, he could produce 300 more units of apple.