In an examination, a student gets 3 marks for each correct answer and 1 mark is deducted for each wrong answer. If he solves all 60 questions and scores 100 marks, find the number of questions he solved correctly.

A logistics manager oversees 39 shipments, each containing 41 electronics units. If 74 units are found damaged and the rest are distributed equally among 61 retail stores, how many units does each retail store receive?

If the cost of 514 kg apples is ₹ 336, the cost of 512 kg grapes is ₹ 206.25, and the cost of 334 kg oranges is ₹ 78, then what is the total cost of 312 kg apples, 8 kg grapes, and 112 kg oranges?