Snow White decides to measure the Seven Dwarfs. Doc is $$10\text{cm}$$ taller than Happy, who is $$10\text{cm}$$ taller than Dopey. Dopey, Sneezy, Bashful and Grumpy are all the same height. Sleepy is $$80\text{cm}$$ tall. Doc and Sleepy have the same combined height as Dopey and Sneezy. What is the total height of the seven dwarfs? 
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