Monthly Amount
noun
A month's amount is the monthly amount.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
それって月額いくらですか？
How much is that per month?
このアプリは、月額たったの五ドルです。
This app is only $5 per month.
月額基本料金が安いスマホのキャリアに変えました。
I switched to a new smartphone carrier with a low basic monthly fee.
月額たったの5ドルでできる新しい日本語学習体験を促進するための広告キャンペーンを打ち始めます。
We are starting an advertising campaign to encourage a new Japanese learning experience that costs only five dollars a month.