Calculation logic of moving price

Dear experts,

May one cognize if you tin assistance to explicate maine what's the calculation logic of moving terms erstwhile not applicable for Settlement and worldly Price power is 'S'？

As per my understanding, if the worldly which is nary question successful the existent period, the material's PUP should EQ to past period's PUP, meantime the moving terms should besides beryllium adjacent to past period's PUP. But successful my strategy environment, I couldn't find a logic to cipher the nonstop terms done the instrumentality of humanities prices.

Material configuration：Price control'S' & Price Determ'3'

Looking guardant your kindly help.

Related t-code: CKM3&MM03

Thanks and champion regards,

Charles