The answer would be Slender
In high schools in the United States, where all courses are usually the same number of hours, often meeting every day, students earn one credit for a course that lasts all year, or a half credit per course per semester. This credit is formally known as a Carnegie Unit.
So you can be ready an energized for the next day
Prices. The more scarce a resource, the pricier it is. so, you can buy less of that resource. This will have income and substitution effects on your financial management.