Due to popular demand, the command tpcalc was slightly improved.
'help tpcalc'
You may notice that it does not always yeld the result asked for.
This is because TP:s are cheaper than Euros, and taskpoints are natural
numbers (!). It will round up to the nearest taskpoint.
For example,
*> tpcalc 10 euros inverse
10 taskpoints would cost you 6 Euros.
*> tpcalc 11 euros inverse
12 taskpoints would cost you 7 Euros.