How to sum two elements of the array ? : ***NSMutableArray *array = [NSMutableArray arrayWithObjects:
                                @"22,343", @"44,323",@"34,5678",@"22,725", nil];***

i have  this array and I want to sum two values this array.
like this array[0] + array [1]
 
how to sum this elements? 
thanks !!