I don't get the meaning of という店もあります in that sentence. I understand: "This month sales were 10 times higher than the sales from April last year", then I have no clue for the end of the sentence.
今月の売り上げが去年の4月の10倍になったという店もあります
My guess is:
"This month sales were 10 times higher than the sales from April last year for one of the shop".
By the way, this is the complete sentence:
大阪ではタピオカを入れた飲み物を売る店がたくさんできていて、今月の売り上げが去年の4月の10倍になったという店もあります。
Can you guys help me please?