Which statement is right? A: Our usual packing for dyed poplin is in bales with 500 yards each. B: Our usual packing for dyed poplin is in bales, each containing 500 yards. C: We usually pack dyed poplin in bales, each contains 500 yards. D: Dyed poplin is usually packed with bales of 500 yards each.

A student spends all of her income on pizza and books. When pizzas cost $3 each and books cost $10 each, she consumed 30 pizzas and 3 books per month. The price of pizzas fell to $2.90 each while the price of books rose to $11 each. The price change:

Assume a non-price discriminating monopolist can sell 20 units of a good for 4.00 each and can sell 21 units of that good for $ 3.85 each. The marginal revenue of the 21st unit is:

4. __________________they couldn’t understand each.

3. The T-shirts are US$30 each. ( )

In wooden cases of 50 dozen each.

Output amplifiers are packed______ cartons of 100 pieces each.

(英译汉）Walnuts are packed in gunny bags of 50 kilos each.

Match Column A with Column B and give one example for each.

Diner A: Let’s __________the bill.Diner B: Ok. 80 Yuan each.