Answer:
selling price=Rp 540,000.00.
profit=20%
cost price=selling price- profit% of cost price
cost price+profit% of cost price=selling price
cost price (1+20%)=Rp 540,000.00.
cost price=Rp 540,000.00./(1+20/100)=Rp 450000.00 is your answer
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