Yes. The 's' numbers are easier to add. Assuming those 3 value sets are in A1, B1, and C1, the formula would be the following for the 's' sum:

=LEFT(A1,1)+LEFT(B1,1)+LEFT(C1,1)

For the 'n' sum:

=MID(A1,4,1)+MID(B1,4,1)+MID(C1,4,1)

CAVEAT: This is assuming the digits are always one digit and not two-digits, such as '10' or '15'. If you need to handle two or more digits:

For the 's' sum:

=LEFT(A1,(FIND("s",A1)-1))+LEFT(B1,(FIND("s",B1)-1))+LEFT(C1,(FIND("s",C1)-1))

For the 'n' sum:

=MID(A1,FIND(",",A1)+1,((LEN(A1)-1)-FIND(",",A1)))+MID(B1,FIND(",",B1)+1,((LEN(B1)-1)-FIND(",",B1)))+MID(C1,FIND(",",C1)+1,((LEN(C1)-1)-FIND(",",C1)))

That gets kind of hairy, as you see but it can be done. The other option is to run a TEXT to COLUMNS on the cells and split on the comma as the delimiter. This will separate the two and then you can use the solution for the 's' sum for both.