Sales
Noun
うりあげ
だんだん売り上げがへってきた。
Sales gradually decreased.
アメリカ人人気はいゆうが主えんしたハリウッドえいがのDVDは、日本だけで売り上げが八百万まいになった。
The DVD of the Hollywood movie in which a popular American actor played the main character has sold eight million copies in Japan alone.
あの性差別の広告のせいで、売り上げが激減した。
Sales have decreased rapidly because of that sexist advertisement.
The selling that you've raised (上げ) is the amount sold or number of sales. Think of a graph going upward, where it's rising as you sell more things.
The reading for 売 is the one you learned with 売る. The reading for 上げ is the same as the reading for 上げる, a word you learned previously. If you know those two separate things, you should be able to combine them into one awesome vocab thing.