Sudoku 10-20-30 (Fun With Sudoku #32)

This Sudoku type appeared in World Sudoku Championship 2011 and I created it for the practice of the Indian Sudoku team. This is an easy Sudoku to give an introduction to this Sudoku type.
I am re-posting this Sudoku 10-20-30 as my 32nd Sudoku in the Fun With Sudoku Series. Can you solve this Sudoku 10-20-30 puzzle?

Rules of Sudoku 10-20-30

Classic Sudoku Rules apply.  Additionally, the sum of any grey region equals 10, 20, or 30.

Sudoku 10-20-30 (Fun With Sudoku #32)

Sudoku 10-20-30 (Fun With Sudoku #32) Solution

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Solution of Slalom Sudoku (Daily Sudoku League #76)

Slalom Sudoku (Daily Sudoku League #76) Solution