%-------------------------------------%
% Homework 3: problem 3.3             %
% Date: 9/30/02                       %
%                                     %
% Gun Srijuntongsiri                  %
% gs61                                %
% ??????                              %
%-------------------------------------%

weight=input('Enter weight (lbs) : ');  % weight in pound, user input.
cost = 0;   % delivery cost in dollars, initialized to zero.

% Check for overweight. If not, calculate the cost
if weight > 100
    disp('Overweight. Will not be processed.');
else
    cost = cost+10;      % first two pounds charge.

    % If more than 2 lbs, $3.75 for additional lbs.
    if weight > 2
        cost = cost+3.75*(weight-2);
    end
    
    % If more than 70 lbs, $10 excess weight surcharge is added.
    if weight > 70
        cost = cost+10;
    end
    
    % Finally, display total cost.
    disp(['The cost of sending this package is $',num2str(cost)]);
end