Thanks for the quick response and solution to our unusual question. We have used part of the solution for all the number format line items by creating mapping module using the line item subset as suggested. Rest we thought long and hard and finally resolved that since we had only a few line items with other than number format, we created a separate view on the dashboard for these line items. I didn't quite grasp what you mean by the 'subset by type' for all the other type of line items like boolean.
Would appreciate if you could share a small example on what exactly you mean.