Explanation:

• Double Coincidence of Wants refers to the difficulty in finding someone who wants exactly what you have to offer and who has something you want in return. In a barter system, for a transaction to occur, both parties must want what the other is offering. In this scenario, Ram wants jackets but Dev does not need shoes. Money solves this problem by acting as a common medium of exchange, allowing Ram to sell shoes for money and then use that money to buy jackets from Dev, even if Dev does not need shoes.

• Store of Value: Money serves as a store of value, meaning it can be saved and used later without the issues of spoilage that affect perishable goods like jams and pickles. This solves the problem of dealing with products that may expire soon, as Ram does not have to take jams and pickles he cannot use immediately.

The problem of Costly Products is not directly addressed by money in this context; rather, it relates to the inherent nature of the products and their production costs.