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Sagot :
Answer:
2.70$
Step-by-step explanation
If you take 1.08$ and divied it by 18 you will get 0.135$, and you need 12 more copies to make 30 copies so you multiply 0.135$ by 12 and get 1.62$ and then you add 1.62$ to 1.08$ and you get 2.70$.
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