can I sum one column if the value of another column is ex. "M"

[Wanda]

I need to sum column D (currancy) if the value of column C is an "M"

I've been trying =SUMIF but can't seem to get it right.

 

[Don Guillett]

try
=sumif(c2:c22,"m",d2:d22)

 

[Allllen]

=SUMIF(C:C,"M",D)