Sheffield Corp. spent $8400 to produce Product 89, which can be sold as is for $10500, or processed further incurring additional costs of $3150 and then be sold for $14700. Which amounts are relevant to the decision about Product 89? $8400, $10500, and $3150 $8400, $10500, $3150 and $14700 $8400, $10500, and $14700 $10500, $3150, and $14700