Question: A stationery shop bought 10 boxes of writing paper listed at $5 each and 200 greeting cards listed at $3.00 each. If the single discount rate for the purchase is 15%, find the trade discount.
2. Five desks are listed at $400 each, with a trade discount series of 20/10/10. Also, 10 bookcases are listed at $200 each, discounted 10/20/10. Find the total net price for the desks and bookcases.