How capacity requirement calculated in RCCP in SOP

Hi,

I am executing RCCP (Rough cut capacity planning in SOP)  for a material through MC93... I am in the below situation as shown in the below screen shot... in the below screen shot if we consider April 2014 month I understood how available capacity 34819 (MIN) is calculated but not getting how capacity reqmt 397 (MIN) is calculated... can anybody guide me on this how capacity reqmt is calculated....

Thanks

Kumar