(ECONOMICS) please help

Identify the type of source based on the information provided. a historian found a journal belonging to an ancient indian princess. the princess liked to keep a record of all the royal women of her dynasty who lived before her time. she tried to collect as much accurate information about their history as possible. her journal is a great source of historical information. based on the passage, the princess’s diary is source.

In a story containing the following points, which would likely occur last?

Jim has 16 books doug has 10 fewer books than jim how many books does doug have?