The 40 to 60 are unlikely to be from Apple Music. Apple music can't just randomly charge whatever it wants.
Since Apple charges have no identifying information on your payment's monthly statement, there is no way to know what it s for from there. But again, it's extremely unlikely it is an Apple Music charge at all, unless you are actually buying songs and albums outside of the Apple Music subscription.
Check your active subscriptions and recent purchases. Sounds like you are probably subscribed to something else. If you share your Apple ID or payment methods or are the organizer in Family sharing check with whoever you share them with or are part of your family sharing group.
Link-> If you see 'apple.com/bill' on your billing statement - Apple Support