Final answer:
If Crosby and Dash are in disagreement about the exact amount of money that Crosby owes Dash and they choose to form a new agreement at a set amount, their conduct would be an example of a contract modification.
Step-by-step explanation:
Based on the given information, if Crosby and Dash are in disagreement about how much money Crosby owes Dash, they may choose to form a new agreement at a set amount. If they both agree to the new terms and perform the newly formed agreement, their conduct would be an example of a contract modification. A contract modification refers to a change made to the original terms of a contract by mutual agreement of the parties involved.