Answer:
He has to enhance quality of its product.
Step-by-step explanation:
He has no close contracts with shopkeeper in order to sell his product. His oil has low quality which is the main reason for not selling his oil. For making profit, he has to enhance the quality of oil as well as having close contracts with shopkeeper so that the oil will be sold at high price and make more profit. He should have patience and use his brain in order to make good profit and gain advantage from these ideas.