6. BOOKLETS 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. Each order
consists of a $10 shipping charge, no matter the size of the order.
a. Write a piecewise-defined function describing the cost of ordering booklets.
b. What is the cost of purchasing 132 booklets? What it is the cost of purchasing
518 booklets?