First find the total cost of the SUV: $30,000 * 2 = $<<30000*2=60000>>60,000
Then add the cost of the coupe to find the total cost of the cars: $60,000 + $30,000 = $<<60000+30000=90000>>90,000
Multiplying that amount by Melissa's commission rate, we find her earnings are $90,000 * 2% = $<<90000*2*.01=1800>>1800
#### 1800