Facing problem in solver based linear programming problem

Hello,

I cannot solve this problem by using solver based linear programming approach. For the attachment code I saw the below error. Please help me to get out from this loop.

Error using Untitled113 (line 6)

Error: Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.

Answer 1

[Walter Roberson]

You used U+0092 PRIVATE USE TWO characters instead of ' characters in your definition of the variable names.’’’

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval