What is a critical factor in determining whether something gets produced as a public good?

Cost is a critical factor in determining whether something gets produced as a public good.

Explanation:

In the areas of manufacturing, science, trade and accounting, the expense is the value of money used to create or provide a service and is therefore no longer readily available. The costs can be one of acquisitions in industry, whereby the amount of money paid to buy it is deemed to be an expense.

In this case, the money is the input to obtain the object. The purchase price might be the sum of the cost of production paid from the original manufacturer and other transaction costs borne by the consumer above and beyond the price paid to the seller. The price usually often provides a profit margin on production costs.

Direct costs include consumables, related supplies, selling fees and inventory.