A digital media company is ordering booklets to promote their business.  The manufacturer charges $0.50 for each booklet when 50 or fewer are ordered, $0.45 for each booklet when 51 to 100 booklets are ordered, $0.40 for each booklet when 101 to 250 booklets are ordered, and $0.35 for each booklet when 251 or more booklets are ordered.  A $10 shipping charge is added to each order, regardless of the size of the order.