tableau count non zero values in a row - row

Question

I have data in tableau like below
day employee expense_reason expense
2/24/2018 abc car mileage $5
2/24/2018 xyz car mileage $5
2/24/2018 xyz car rent $8
2/24/2018 xyz car rent $9
I want to find occasions when on a same day, single employee claims both expenses. I am producing below view in Tableau using
day and employee as rows
expense reason as column
and sum(number of rows) as Text
i am getting grand total using analysis>>totals>>show row totals
instead of getting row totals, how could i get count of non zero values in a row
expense_reason
day employee car mileage car rent grand total
2/24/2018 abc 1 1
2/24/2018 xyz 1 2 3
update 1
i tried below as per one of the answers but it is not giving output that i want

Answer 1

First of all you should solve the No-Data part since there's no data for the combo abc-rent.
You can achieve this using the lookup function, forcing a fake lookup using 0 as parameter.
Something like this:
LOOKUP(SUM([Something]),0)
Then you can use ZN function to force a zero for a null value, which is different from No Data.
That being said, you should be able to get something like this:
Here's the Calculated field:
zn(LOOKUP(max({ FIXED [day],[employee],[reason] : COUNT([reason])}),0))
EDIT
If you want to have grand totals, i think this should be the better solution:
And the Calculated Field is a pure Count nested in a lookup function as said before:
zn(LOOKUP(COUNT([expense]),0))