Operating costs and Operating cost

Operating cost and operating costs are semantically related In some cases you can replace phrase "Operating cost" with "Operating costs", this phrases are similar.

Operating cost noun - The expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes.

Operating costs and operating cost are semantically related in money needed to run a business topic. You can use "Operating costs" instead a noun phrase "Operating cost".