Answer:
Andy had to wash the dishes because he spilled 3214 mg more than Lowell.
Explanation:
First, you have to find how many mg are in 2.49 g. 2.49g=2490mg So, Lowell spilled 2490 mg, and Andy spilled 5704 mg. Since Andy spilled more, he had to wash the dishes. The difference between the numbers is 5704-2490=3214 mg