The first manual for ClarisWorks 1.0 (labeled U91-600-006A on the back of the cover) has an error in the example for the NPER function. The example shown is:
NPER(10%/12,-250,-2000,12000) returns $32.77 using a fixed number format
This example is trying to show that in order to purchase a $12,000 car at 10%, with a $2,000 down payment, and payments of $250 a month, you would have to make a little more than 32 payments; but this improperly shows the use of the function. The proper use and example is shown in the second manual for ClarisWorks 1.0 (labeled U91600-006B on the back of the cover), and is as follows:
NPER(10%/12,-250,10000) returns 48.86 months using a fixed number format