Did I make a mistake in my moment calculation for the distributed load?

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SUMMARY

The discussion centers on the moment calculation for a distributed load, specifically addressing the values of Ra = 200 N and Rc = 1300 N. The participant suspects an error in their moment calculation related to the triangular portion of the distributed load. A thorough review of the moment calculation is essential to ensure accuracy in structural analysis.

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Referring the question and my own worked out solution in the attachment, I could not get to the answer given that is Ra= 200 N, and Rc = 1300 N. Is there any calculation mistake I made?
 

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Check your moment calculation for the triangular portion of the distributed load. I think there is an error there.
 

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