diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 9d0b804..540915f 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1318,8 +1318,8 @@
 				- Comprehensive prototype. (5 marks) (2019)
 				- three phases of prototyping ( 2018)
 				- uses of prototypes ( 2018)
-			- ### Costs (2019) Topic 11-12
-				- Component costs, (5 marks) (2019)
+			- ### Costs (2019) Topic
+				- Component costs, (5 marks) (2019) Topic 14
 				- Support costs, (5 marks) (2019)
 				- Indirect allocations as part of Overhead costs. (5 marks) (2019)
 			- ### New products and New product development (2019, 2018)