 
<translate> Iji gwọọ nkịta 20 ya, Maazị Sean na-ana Khalil 20 * $60 = $1200. Khalil kwụkwara $40 * 60 = $2400 nye Maazị Sean iji gwọọ nwamba ya. N'ozuzu ya, Khalil kwụrụ Maazị Sean $2400 + $1200 = $3600 iji gwọọ ụmụ anụmanụ ya. Ya mere, azịza ya bụ 3600. <eng> To treat his 20 dogs, Mr. Sean charged Khalil 20 * $60 = $1200. Khalil also paid $40 * 60 = $2400 to Mr. Sean to treat his cats. Altogether, Khalil paid Mr. Sean $2400 + $1200 = $3600 to treat his pets. So, the answer is 3600. 