From b8a404e68393aa8442051044a8de91522bbf3024 Mon Sep 17 00:00:00 2001
From: EspenTinius <tiniusespen@gmail.com>
Date: Thu, 19 Feb 2026 22:18:17 +0100
Subject: [PATCH] SaleClaculator methods

---
 .../idatt2003/g40/mappe/SaleCalculator.java   | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleCalculator.java b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleCalculator.java
index b45faa3..b9736fd 100644
--- a/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleCalculator.java
+++ b/src/main/java/edu/ntnu/idi/idatt2003/g40/mappe/SaleCalculator.java
@@ -16,4 +16,33 @@ public SaleCalculator(Share share) {
         this.salesPrice = share.getStock().getSalesPrice();
         this.quantity = share.getQuantity();
     }
+
+    @Override
+    public BigDecimal calculateGross() {
+        return salesPrice.multiply(quantity);
+    }
+
+    @Override
+    public BigDecimal calculateCommission() {
+        return calculateGross().multiply(COMMISSION_RATE);
+    }
+
+    @Override
+    public BigDecimal calculateTax() {
+        BigDecimal purchaseCost = purchasePrice.multiply(quantity);
+        BigDecimal profit = calculateGross()
+                .subtract(calculateCommission())
+                .subtract(purchaseCost);
+
+        return profit.signum() > 0
+                ? profit.multiply(TAX_RATE)
+                : BigDecimal.ZERO;
+    }
+
+    @Override
+    public BigDecimal calculateTotal() {
+        return calculateGross()
+                .subtract(calculateCommission())
+                .subtract(calculateTax());
+    }
 }
\ No newline at end of file