How to write sum workflow in KNIME?

A B C D K1 A*K1 B*K1 C*K1 D*K1
21 33 20 31 14 294 462 280 434
17 16 47 27 17 238 224 658 378
Total 38 49 67 58 31 532 686 938 812
Target 532 686 940 821
Target-total 0 0 2 9

 

i would like to have such a calculation: A*K1, B*K2 etc. and then sum the total value to have a comparison with the target. Currently i have no idea to write the work flow, i wounder the note i could use for this work flow. Very appreciate your help! 

You could use math nodes to multiply columns of your choice, then transpose the matrix to do the sums with another math node and transpose it again.

it works, thanks!!!