title: PHP Commercial round currency
body: <p>Dear Stackoverflowers,</p>
  
  <p>I would like to know what sollutions you can come up with for the following problem:</p>
  
  <p>This is what I have:</p>
  
  <pre><code>13.90
  5.03
  7.06
  2.51
  </code></pre>
  
  <p>This is what I want:</p>
  
  <pre><code>13.90
  5.05
  7.05
  2.50
  </code></pre>
  
  <p>Basically: I want to round currency on a commercial base. There last decimal may only be rounded up to 5 or 10 (adding one to the first digit) or rounded down to 5 or 0.</p>