The correct answer is A. incoming freight.
Purchasing costs are the costs associated with the acquisition of goods and services. They include the cost of the goods or services themselves, as well as any associated costs such as transportation, insurance, and taxes.
Incoming freight is the cost of transporting goods from the supplier to the buyer. It is a major component of purchasing costs, especially for businesses that purchase large quantities of goods.
Storage costs are the costs associated with storing goods after they have been purchased. They include the cost of rent, utilities, and labor.
Insurance costs are the costs of insuring goods against loss or damage. They are typically a small percentage of the purchase price of the goods.
Spoilage costs are the costs of goods that are damaged or destroyed before they can be sold. They can be caused by a variety of factors, such as improper storage, handling, or transportation.
In summary, the correct answer is A. incoming freight. This is because incoming freight is a major component of purchasing costs, especially for businesses that purchase large quantities of goods.