The single-price monopoly sets the price it charges for its product equal to the marginal cost of producing the product plus a markup. The single-price monopoly does this in order to maximise profits.  

The marginal cost is the cost of producing one extra unit of output.

how does a single-price monopoly determine the price it will charge its customers? ?

A battery is a storage device for electricity. The chemical reactions inside the battery that move electrons and ions create a potential difference between two terminals of the battery. This potential difference represents stored energy. A car battery stores electricity so that you can start your car and drive it down the road.
If you see the error code 80710D23 when trying to download apps on your iPhone or iPad, don’t worry. The error means that the app that you’re trying to install isn’t compatible with your device. The solution is to look for the app on the App Store for your iPhone or iPad.
If you're getting error 80710d23 you may be trying to connect to Xbox Live with a wireless connection, and your router is set up to broadcast the 2.4GHz band. In order to connect to Xbox Live, you will need a network adapter or router that broadcasts on the 5GHz band.