Mr. Sean has a veterinary clinic where he charges clients $60 to treat a dog and $40 to care for a cat. If Khalil took 20 dogs and 60 cats to the clinic for treatment, how much money did he pay Mr. Sean?
To treat his 20 dogs, Mr. Sean charged Khalil 20*$60 = $
<gadget id="calculator">20*60</gadget>
<output>1_200</output>
1200.
Khalil also paid $40*60 = $
<gadget id="calculator">40*60</gadget>
<output>2_400</output>
2400 to Mr. Sean to treat his cats.
Altogether, Khalil paid Mr. Sean $2400+$1200 = $
<gadget id="calculator">2400+1200</gadget>
<output>3_600</output>
3600 to treat his pets.

<result>3_600</result>