Which of the following error is an error of omission?
Trial balance of Radhika did not agree. Radhika put the difference to suspense account. subsequently she located the following errors. 1) Furniture purchased for Rs 6,000 was posted to purchases account as Rs 600. 2) Repairs to Machinerry Rs 500 were debited to Machinery account. 3) Wages paid for installation of Machinery Rs 750 was posted to wages account. 4) Purchased material Rs 8,000 and wages Rs 2,000 were used for construction of building not recorded in the books. 5) Total of sales returns book Rs 2,000 was not posted to the ledger. 6) Old Furniture sold to Dinesh at its book value of Rs 2,500 was recorded through sales book.