Tax - gender and yearly income?

Hi, I am trying to calculate the income tax for a given person by status and yearly income, according to the table below for single and married persons. I have to use the switch and if commands but don't really know how to connect the two.

                   Single Person                        Married Person    
  chargeable income  Rate  Deduct  chargeable income  Rate  Deduct
  0-8500                    0  0  0-11900                   0  0
  8501-14500           0.15  1275  11901-21200          0.15  1785
  14501-19500           0.25  2725  21201-28700          0.25  3905
  19501 and over           0.35  4675  28700 and over          0.35  6775

...this is what i've tried so far...thanks for the help!!!

function y=x
switch status
case 'single'
c = [0 1275 2725 4675];
if x=0:1:8500;
    y=x
else
    if x=8501:1:14500;
        y=x-1275;
    else 
        if x=14501:1:19500;
            y=x-2725;
        else
            if x=19501:1:inf;
                y=x-4675;
            end
        end
    end
    case 'married'
c = [0 1785 3905 6775]
otherwise
error('none')
end

Answer 1

[Walter Roberson]

Hint:

if 0 <= x & x <= 8500
  y = x - c(1);