What is the harder subject you guys ever did

Abigail spent $100 on a new edition of the personal finance textbook rather than $75 for a used copy. the additional cost for the new copy is called the

Any point on a country's production possibilities frontier represents a combination of two goods that an economy:

Two products, qi and vh, emerge from a joint process. product qi has been allocated $34,300 of the total joint costs of $55,000. a total of 2,900 units of product qi are produced from the joint process. product qi can be sold at the split-off point for $11 per unit, or it can be processed further for an additional total cost of $10,900 and then sold for $13 per unit. if product qi is processed further and sold, what would be the financial advantage (disadvantage) for the company compared with sale in its unprocessed form directly after the split-off point?