Step 1 :\( \text{Avery's weekly earnings: }\frac{360}{4} = 90 \)
Step 2 :\( \text{Carmen's weekly earnings: }\frac{480}{6} = 80 \)
Step 3 :\( \text{Avery's 12-week earnings: }90 \times 12 = 1080 \)
Step 4 :\( \text{Carmen's 12-week earnings: }80 \times 12 = 960 \)
Step 5 :\( \text{Earnings difference: }1080 - 960 = 120 \)