Final answer:
Quipus were a record-keeping system used by the Inca civilization to calculate and track transactions in their empire. The knots on the quipus conveyed information such as the number of crops and animals in each village.
Step-by-step explanation:
At the beginning of the New Year, the rulers of each village came to Cuzco with their quipus, which were a record-keeping system used by the Inca civilization. Quipus were made up of colored strings with knots tied at various distances from each other. Different colored strings, types of knots, and their positions conveyed information such as the number of crops and animals in their villages.