RS. 657Loss PERCENT is \(8\frac{3}{4}\)%Formula Used:Loss = CP – SP,Loss % = Loss/CP × 100,Where,CP is cost price,SP is selling priceCalculation:\(8\frac{3}{4}\)% = 35/(4 × 100) = 7/80Let CP be Rs. 80, Loss will be Rs. 7⇒ SP = 80 – 7 = 73According to the question,⇒ 73 = 657⇒ 1 = 657/73⇒ 1 = 9Cost price is,⇒ 80 × 9 ⇒ 720∴ He PURCHASED the necklace for Rs. 720.