Required static value from existing column

[vijaykumarj19]

I have c1 and c2 columns 
Required R1 and R2 

sum(c1)=90

R1 = sum(c1)/10 this output should be in each row of R1 column

and R2 = running total of R1 based on c1

please help me if you have any idea

[amitchandak]

@vijaykumarj19 , C1 is text, C2 is numeric

Both as new column

R1 = sum(Table[c2])
R2= sumx(filter(Table[C1] <=earlier(Table[C1])),Table[C2])

[vijaykumarj19]

If i want to start R2 from column c1 = Test2 , then