Reward Points Module for ZC v13x

[snowy2007]

Is there any way, on the product info page, to make the number of reward points (ratio is set to 1 point per £1) to be equal to the product price INCLUDING tax rather than excluding?

For example :

I have a product priced at £39.99 INCLUDING Uk tax (vat) at 15% - It is showing as carrying 33 Reward Points.

EDIT: I know I can set the ratio to 1.15 but it doesn't seem like the ideal way of doing it as the calculation is then incorrect if I set the module to calculate final points via subtotal rather than via per product values.