Hello I have a column for my item cost and a column with the sales tax I paid. I want to create a formula in the third column that calculates my cost x sales tax percentage and then add the answer to the cost to get total cost. I did Cost * {Tax %} and get an error.

# Calculate Sales Tax and Total Cost

**Ptt_Pch**#2

Did you get an `#Error`

as result of your formula ? Was the result erroneous (not the right result) or the formula did simply not work and you couldn’t save your formula field?

I’m simply asking because there is a bug in calculations with a percent

**Ptt_Pch**#4

I quickly tried this formula :

```
Cost+Cost/100*{Tax %}
```

Which gave something looking like this :

Was this what you were looking for ?

(The `Cost*Tax%`

field was just there to verify the math )

The `Total Cost`

is formatted as “Currency”. The `Cost`

is `/100`

To go around the bug with calculations with percentage.