Can we sum lastletter of string?

i have data with

A = 111n22

B = 444m11

C = 777n55

I want select last letter of A B and C and then sum it. Pls help me!

Answer 1

[Stephen23]

>> A = '111n22';
>> B = '444m11';
>> C = '777n55';
>> sum(str2double(regexp({A,B,C},'\d$','match','once'))) % single
ans =  8

Or perhaps:

>> sum(str2double(regexp({A,B,C},'\d+$','match','once'))) % multiple
ans =  88

[NGÔ LÝ NGUYÊN]

thank you so much