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Needing assistance for a mechanical advantage calculation on a scissor lift like device

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I'm working on a project for my machine design class and I am needing to find out a mechanical advantage on the device shown below.  As you can see, it is a scissor lift like device that lifts a load upward with a linear actuator.  The actuator, for the moment, is horizontal and is pushing in the direction of the red arrow shown, it's just not modeled yet.  I've done some research but the most I can find is that the mechanical advantage is the (distance output/distance input) but I just wanted to double check if anybody had a different equation.  Thank you so much!

PS I wasn't sure how to upload an image on here so I put the imgur link below.  Thanks!

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