diff --git a/src/main.rs b/src/main.rs
index ef904f0..7c05dd2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -193,9 +193,9 @@ impl PreparedCustomer {
             .map(|p| p.amount.parse::<f64>().unwrap())
             .sum();
 
-        let rounded_grand_total = grand_total.round();
-        let avrundningsfel = grand_total - rounded_grand_total;
-        let oresutjamning = total_from_transactions - rounded_grand_total;
+        let avrundningsfel = total_from_transactions - grand_total;
+        let rounded_grand_total = total_from_transactions.round();
+        let oresutjamning = rounded_grand_total - grand_total - avrundningsfel;
 
         let summary = Summary {
             total_volume: fmt(total_volume),