When I look at entries during GR movement 101, they are done using Accounts defined in BSX and WRX for specified COA, but I cannot understand from where the movement type links to Account determination. When I look at tx OMJJ, I can see various combinations and value strings assigned to movements type, but I could not find any combination for BSX and WRX.

I am looking here to understand, exactly how the system determines the Account determination and the calculate the amounts to be posted to each key, as during a GR posting itself, there can be differences due to Price Difference (when Price control is set to S), exchange rate difference.