7GUIs
What are reasonable times for completion of each of the tasks? My rusty Lazarus/Free Pascal coding times so far are:<p><pre><code>  1) Counter - 10 minutes
  2) TempConv - 30 minutes
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Code is up on github: <a href="https://github.com/mikewarot/7guis" rel="nofollow">https://github.com/mikewarot/7guis</a><p>The only tricky bit I see is expression evaluation in the spreadsheet, the rest is straightforward.