HELP ON QUESTION 2 FOR LAB QUIZ 10

I cant figure out how to do question 2...this is the practice problem on the cd... can someone show me step by step how to do this?

2) When doing the experiment sketched above you heat up the brass containers with a combined mass mb = 197 grams and an amount of water with a mass mw = 305 grams. What is the amount of heat absorbed (Ch 13 sheet by the cups and the water (in calories), if their initial temperature (at the start of the cranking) and their final temperature (after ending the cranking) is 4.46 0C below and above room temperature, respectively (Use the specific heats given in Table 1 of the lab manual for this experiment 10) ? Indicate with a negative (positive) sign whether the equivalent amount quoted in SI units is different from (equal to) your result in calories. (the answer they gave me was -2882.26608.

Oh yeah this is the forumla they said to use:

Q=(mbcb+mwcw)(change in temp)

change in temp is just the # in degrees they gave multiplied by 2.

Now my question is i multiplied mb and my cb is .092 right? and my cw is 1.000 right? change in temp. i did what they told me i believe my temperature was 4. something i multipled that by 2 and got 8.92 and i still get the wrong answer....any ideas?