相場が決まっている（そうばがきまっている）

Japanese vocabulary

Meaning: to be taken for granted; to be generally accepted; to be the established wisdom; to be the (social) convention; to be the customary thing to do

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “相場が決まっている” pronounced in real videos (YouGlish)