Free points and brainliest​

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

1. gdp is calculated by summing consumption, investment, and exports of all final goods and services produced within the borders of a given country during a specific period the dollar value of all final goods and services produced within the borders of a given country during a specific period government expenditures within the borders of a given country during a specific period the quantity of all final goods and services produced within the borders of a given country during a specific period

Arestaurant that creates a new type of sandwich is using (blank) as a method of competition.