Card game switching Q K J and T from string to numbers and adding the card up

Ok so my input comes in with an answer of face value of two card. ie... 'Q2' is a queen and a two... I need to add the cards together but I need to fist change all Q K J T to Q,K,J,T=10 and A=11 then add them.... How would I arrange my if else... I've been playing with string2num and letters2num and I can't seem to get it.

[dpb]

>> FACES='JQKA'
FACES =
    'JQKA'
>> card='Q';
>> V=strfind(FACES,card)+9
V =
    11
>> card='A';
>> V=strfind(FACES,card)+9
V =
    13
>> 

[David Hill]

Depending on what you are doing, you might want to look at defining card as a class.

classdef card