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| rev | Admin | (Created page with "'''Key: D''' At 250 the payment is 0. At 1000 the payment is 1000. Interpolating: <math display = "block"> \frac{700-250}{1000-250} = \frac{x-0}{1000-0} \Rightarrow x = 450(...") | May 14'23 at 16:32 | +223 |