Is is possible to do quick sum up/average by selecting specific cells in SAP IBP Planner Workspace?

I would similar to spot sum up oregon mean worth of mates of cells selected, akin to Excel functionality, so, let's accidental if I person 100pcs successful June and 30pcs successful February - by selecting 2 months I would similar to spot 130 pcs calculated and displayed connected the fly, not the full KF total. Is it imaginable successful web interface - Planner Workspace?

Thank you!