diff --git a/README.md b/README.md
index e017b49..7cb811e 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,7 @@ Filament masses from Bambu Studio estimates, using Bambu PLA Basic.
 
 * Left frame: $3.54 USD (141.84g, as of 2023-09-12)
 * Right frame: $3.54 USD (141.84g, as of 2023-09-12)
+* Top panel: $3.38 USD (135.40g, as of 2023-09-12)
 * 8 16mm M4 bolts to connect the frames: $0.72 USD (you can get a pack of 100 on Amazon for $9, as of 2023-09-12)
 * 8 M4 flange nuts to connect the frames: $0.68 USD (you can get a pack of 100 on Amazon for $9, as of 2023-09-12)
 * 8 45mm M4 spacers to connect panels to frames: $2.40 USD (you can get a pack of 10 on AliExpress for $3, as of