From b95cae2ea7c348d144214181789f39300fd27390 Mon Sep 17 00:00:00 2001
From: Jakob <jakob@rowanbrook.net>
Date: Mon, 23 Mar 2026 16:24:59 +0100
Subject: [PATCH] Ensure grand_total is consistent with product calculations

Calculate grand_total from products (volume * avg_price), matching the product row calculations.
---
 src/main.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index de70f5f..2085f59 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -149,11 +149,6 @@ impl PreparedCustomer {
             })
             .collect();
 
-        let grand_total: f64 = cards
-            .iter()
-            .map(|c| c.total_amount.parse::<f64>().unwrap())
-            .sum();
-
         let mut product_totals: HashMap<String, (f64, f64)> = HashMap::new();
         for card in &cards {
             for tx in &card.transactions {
@@ -187,6 +182,11 @@ impl PreparedCustomer {
             .map(|p| p.volume.parse::<f64>().unwrap())
             .sum();
 
+        let grand_total: f64 = products
+            .iter()
+            .map(|p| p.amount.parse::<f64>().unwrap())
+            .sum();
+
         let summary = Summary {
             total_volume: fmt(total_volume),
             grand_total: fmt(grand_total),