nested if loop in splunk

I would like to write in splunk a nested if loop: What I want to achieve

if buyer_from_France: 
   do eval percentage_fruits
   if percentage_fruits> 10:
        do summation
        if summation>20:
                   total_price
                   if total_price>$50:
                              do(trigger bonus coupon)

My current code (that works):

> | eventstats sum(buyers_fruits) AS total_buyers_fruits by location
> | stats sum(fruits) as buyers_fruits by location buyers 
> | eval percentage_fruits=fruits_bought/fruits_sold 
> | table fruits_bought fruits_sold buyers
> | where percentage_fruits > 10
> | sort - percentage_fruits

How do I complete the syntax/expression for the 2nd (summation) and consequently, 3rd (total price), 4th if-loop (trigger)?