i have tried so hard to understand this and i am totally confused. I just don't know where to begin. Can someone please, please help me??

Given the following information, answer the following:
TR=$3Q
TC= $1,200 = $2Q
1. what is the break-even level of output?
2. If the firms sells 1,300 units, what are its earnings or losses?
3. If sales rise to 2,000 units, what are the firms earnings or losses?
4. If the total cost equation were TC=$2,000 = $1.80Q, what happens to the break-even level of output units?