what does this mean? から+だから？


I found this in textbook.

> チェックインタイムが18.00からだから安いお得なプラン！

I think I can translate it to this:

> "Get special deal if you check in after 18.00"

but I don't get it, why would textbook use "だから” after から




The first から is after a noun and represents the **beginning of a point in
time**.

The second から is after a sentence and creates a subordinate clause indicating
**reason (since/because/so).**

You're checking in (your check-in time is) after 18.00 so you get the good
value plan.

