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Mon Apr 11 10:24:50 EDT 2016

day bed


(+ 5    ;; mattress
   0.5  ;; slats
   3.5  ;; 2x4
   12   ;; stilt
   1.75 ;; 2x2
   ) 22.75


37
3.5

     (let ((l 37)            ;; length
           (n 5)             ;; nb slats
           (g 1))            ;; gaps - slats
        (/ (- l (* n 3.5))   ;; space occupied by slats
           (+ n g)))

3.25

(+ 3.25 (* 5 (+ 3.25 3.5)))






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