Your total purchase price sits on your collection's settings screen, listed as Total Purchase Value.
It adds up the purchase price of every bottle in your collection right now. Bottles you left the price blank on contribute nothing — we never guess a figure for them — and bottles you have removed drop out of it.
On iPhone and iPad
Open Home.
Tap your collection's name at the top of the screen.
Tap Collection settings.
Read Total Purchase Value, near the top of the list.
Home → collection name → Collection settings → Total Purchase Value
On Android
Open Profile, then Settings.
Under Collections, tap the collection you want.
Read Total Purchase Value.
On the web
On app.invintory.com it is on the home page instead of behind settings — Purchase value sits beside Market value in the row of figures at the top. On a narrow window that row collapses and only Bottles and Market value stay visible, so widen the window or use the app.
One storage at a time
Open a cellar or fridge and its header shows a Purchase price for just that storage, next to its label count and market value. The collection total is the sum of these.
If the figure looks blurred
Values are hidden, not missing. Every screen that shows money has a Show values / Hide values control, so you can hand someone your phone without handing over what your cellar cost. Turn values back on and the figure reappears.
Next steps
The difference between market price and purchase price — why this total and your collection value are not the same number.
How to export your collection — to get every purchase price out as a spreadsheet.