A Weighty Problem Puzzle

The Puzzle:

A Weighty Problem

I have ten boxes, with a total weight of 75kg:

15 kg, 13 kg, 11 kg, 10 kg, 9 kg, 8 kg, 4 kg, 2 kg, 2 kg, 1 kg

I want to pack the boxes into 3 crates, but each crate can carry a maximum of 25 kg.

How can I pack the boxes into the crates?

(There may, or may not, be more than one way!)

Do you have the answer? Check against our solution!