How do I increase cost by percent

Let's say I have a "Buy" btn and every time it is clicked, the cost for item is increasing each time by 50%

I need that formula.

Thank you

on "Buy" btn clicked, cost = cost*1.5

Ok, I have attached my Sample shop.

I tried your suggestion and it's not working....

https://drive.google.com/open?id=1sE6MrJbG0HJlTJw2Vnagx7ix-MewespC

I've rounded the value to avoid decimals - you can remove the "round" expression if you'd prefer them.

I've rounded the value to avoid decimals - you can remove the "round" expression if you'd prefer them.

Great! Thank you!

One more question.

Do I need to write same codes for each new shop items or do I use something else like (arrays or families...)?

You can either use a dictionary or array to store values for multiple items. If you want each item to have its own multiplier I'd use an array, otherwise a dictionary is fine.

Here's an example showing both:

dropbox.com/s/eivyzlkjkvhbdli/multiItemShop.capx

Nice! I will look at it later.

Thanks