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diff --git a/1p21.cpp b/1p21.cpp
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+#include <iostream>
+#include "sales_item.hpp"
+
+/*
+ *
+ * Exercise 1.21
+ *
+ *
+ */
+
+int main () {
+
+	Sales_item item1;
+	Sales_item item2;
+	while(std::cin >> item1 >> item2) {
+		std::cout << item1 + item2 << std::endl;
+	}
+	
+	return 0;
+}