Answer: 319
Step-by-step explanation:
Chuck bid $489 on the couch and $89 on the pool table
Mike bid $138 on the couch, and $121 on the pool table.
Chuck gets the couch and Mike gets the pool table and money from Chuck.
If you add $489+89 which equals 578 that is how much chuck bid in total and $138+121 which is 259. Equation will be 578-259 which leads to 319