Buy a items at one price and b items at another: total bill

The same question, asked 2 times: 15 Sep 2025 S1*, 16 Sep 2025 S3. Every wording below, oldest first.

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Question 1
15 Sep 2025 S1
17 $A person buys 4 apples at ₹18 each and 2 melons at ₹35 each. What is the total cost?$
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Question 2
16 Sep 2025 S3
20 $A shop sells erasers at ₹8 each and folders at ₹25 each. If a customer buys 5 erasers and 3 folders, what’s the total bill?$
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