Answer: Jasper's net purchase price unit is $357.
Since Jasper orders in large quantities, Japser is eligible for the trader's discount at 30%.
So, the price per unit will be:

Shipping costs are charged by the shipper and Jasper doesn't get any discounts from the shipper. So, we add shipping costs per unit to the discounted price per unit to arrive at the purchase price per unit.


Answer:
b) it is impracticable to determine some period-specific effects.
c) it is impracticable to determine the cumulative effect of prior years.
Explanation:
According to the actual normativity these are the two options more consistent with the exercise.
The answer is: High-speed presses could mass-produce books, magazines, and newspapers
Due to the ability to mass-produce reading materials, it become much more easier for people to read about new information. This make it easy for people to obtain the knowledge about different cultures without actually having to visit that civilization. The information later on would keep distributed from one person to another and largely contribute to the growth of popular culture.