add bill summary section

src/components/App.tsx

@@ -1,5 +1,6 @@
 import { useBill } from "../hooks";
 import { BillItemRow } from "./BillItemRow";
+import { BillSummary } from "./BillSummary";
 import { ItemForm } from "./ItemForm";
 
 export default function App() {
@@ -31,6 +32,8 @@ export default function App() {
             </div>
           )}
 
+          <BillSummary bill={computedBill} />
+
           {computedBill.items.length > 0 && (
             <button
               className="w-full border border-gray-200 text-gray-400 hover:text-red-400 hover:border-red-200 py-3 rounded-xl text-sm transition-all cursor-pointer"

src/components/BillSummary.tsx

@@ -0,0 +1,37 @@
+import type { ComputedBill } from "../types";
+import { formatCurrency } from "../utils";
+
+interface BillSummaryProps {
+  bill: ComputedBill;
+}
+
+export function BillSummary({ bill }: BillSummaryProps) {
+  if (bill.items.length === 0) return null;
+
+  return (
+    <div className="p-4 rounded-2xl bg-white shadow-sm">
+      <div className="flex flex-col gap-2">
+        <div className="flex justify-between text-sm text-gray-500">
+          <span>Subtotal</span>
+          <span>{formatCurrency(bill.subtotal, bill.currency)}</span>
+        </div>
+
+        {bill.taxPercent > 0 && (
+          <div className="flex justify-between text-sm text-gray-500">
+            <span>
+              {bill.taxType} {bill.taxPercent}%
+            </span>
+            <span>{formatCurrency(bill.taxAmount, bill.currency)}</span>
+          </div>
+        )}
+
+        <div className="border-t border-gray-100 mt-1 pt-2 flex justify-between items-center">
+          <span className="font-bold text-gray-800">Total</span>
+          <span className="font-bold text-indigo-600 text-lg">
+            {formatCurrency(bill.total, bill.currency)}
+          </span>
+        </div>
+      </div>
+    </div>
+  );
+}