Ah I see. Yeah it sucks because this is really a combined issue between Adalo and Airtable. Adalo can’t parse the JSON data past the first level really, and Airtable doesn’t include the botton calculate bar in their API. The only real solution here is to create another table (call it SUM or whatever) with a linked field to the table you want to sum. Then in the new SUM table create a Rollup of the Amount field in the original table. Then call this SUM table by itself anytime you want the sum - it will only ever have one record in it. Anytime you add a record with an amount, you’ll have to link it to the SUM table to include it in the rollup. I wish there was a more elegant solution but that’s the easiest way to accomplish this I think.