Hello

I am trying to count a combination of criteria across a visitor information
log.

For example I am trying to count how many times a NEW visitor with LUNG
cancer attended a BOOKED activity. E.g. from the below I would want to be
able to end up with the answer 2:

New or Return Cancer Type Activity

New Lung Drop In
Return Skin Booked
New Lung Booked
New Skin Drop In
New Lung Booked

Can anyone help? I hope this make sense!

Many thanks
KCR