Answer:
$0 because an agreement to accept different performance in lieu of full payment of liquidated debt is binding.
Step-by-step explanation:
Since there is an agreement between Amy, a baker, and her brother, she owes him $0.
At first, Amy gets a loan of $3,000 from her brother to pay for her dream home. She agrees to pay him back in one year, and that agreement was binding. During the time to pay back the loan, Amy offers to bake her brother's wedding cake instead of paying back the loan and her brother accepts. This has presented a new agreement that overrules the previous agreement. Now instead of paying back the $3,000, she would bake a wedding cake for him. This implies that the wedding cake is equal to $3,000.
Therefore, she owes him $0.