title: Code 16K barcode - checksum computation
body: <p>I found 2 docs abouth this barcode.
  None of them described fine how to compute checksum.</p>
  
  <p>They both just give a formula and didnt say which characters to include in computation.</p>
  
  <p>Also, these docs doesnt present integer values for start/stop/pad or rest special symbols. So if they are included in the computation i even dont know their values.</p>
  
  <p>Does anyone know how to compute checksum ?</p>