diff --git a/src/business.js b/src/business.js
index a8f0cd0..d6a1a0c 100644
--- a/src/business.js
+++ b/src/business.js
@@ -31,8 +31,7 @@ function estimateShipping(weightKg, expedited = false) {
     estimate *= 1.5;
   }
 
-  // BUG: rounds down and loses cents.
-  return Math.floor(estimate);
+  return roundToCents(estimate);
 }
 
 function isValidEmail(email) {
diff --git a/test/business.test.js b/test/business.test.js
index e84f4fa..53de00c 100644
--- a/test/business.test.js
+++ b/test/business.test.js
@@ -30,6 +30,7 @@ test('username normalization trims, lowercases, and collapses whitespace', () =>
 });
 
 test('shipping estimate preserves cents', () => {
+  assert.notEqual(estimateShipping(2.2), 7);
   assert.equal(estimateShipping(2.2), 7.75);
 });