This is supposed to be an addition sum but something is seriously wrong. To correct it you have five zero stickers that you can use to paste over five non-zero digits to make the sum correct. What is the corrected sum?

ANSWER

This was easy! I received a record number of correct answers.

3 0 7 4
0 1 6 0
5 2 0 6
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8 4 4 0
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Answers were received from Andy DeBauch, Christopher Broughton, Michael Hodge, Gwynn White, John Moxon, Clem Robertson, David Groom, Susanne Bone, John Stafford and Richard Birkill

The lucky winner in the draw was Susanne Bone. Thanks for all your answers.