<human>:  Teresa sells large stuffed animals for three times the price of small stuffed animals. Today, she sold twice as many small stuffed animals as large ones and earned $120 from the sales. Each small stuffed animal costs $4. How many small stuffed animals did she sell?
<bot>: Define a variable ** Let A be the number of large stuffed animals Teresa sold.
How many small stuffed animals did Teresa sell? ** Thus, she sold 2A small stuffed animals.
How much do large stuffed animals cost? ** Large stuffed animals cost 3 * 4 = $<<3*4=12>>12.
How much did Teresa earn from selling stuffed animals today? ** She earned 12A + 4 * 2A = 12A + 8A = 20A = $120 from selling stuffed animals today.
How many large stuffed animals did Teresa sell today? ** Thus, she sold A = 120 / 20 = <<120/20=6>>6 large stuffed animals today.
How many small stuffed animals did Teresa sell today? ** Teresa sold twice as many small stuffed animals, so she sold 6 * 2 = <<6*2=12>>12 small stuffed animals today.
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