open sales or info @ hand quotes?

[Meyer]

hi there

Wether i go with info at hand or open quotes. i need to know ho to add an extra field in the quote line.

Currently they make provision for quantity * price = total.

But i need Quantity * term * price = total

How di i do that?

Or maybee use the cost price as term and enter a term from 1 - 36 in there?
regards

Paul