It costs $150 for a furniture store in Toronto to make its famous bookshelves. At the beginning of the year, the store had 210 shelves in stock. It sold 90 shelves at the regular selling price, 60% of the remaining shelves at a reduced price of $210, and the balance at cost.

a. What was the regular selling price of the bookshelves if the store maintained a net rate of markup of 30% based on total sales?

b. What was the rate of markup on the regular selling price?

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