Classify the under-mentioned error into :-
(a) Error of osmission, (b) Error of commission, (c) Compensating error, and (d) Error of principle :-
(I) Purchased goods from Bhardwaj on credit for Rs. 600, but were recorded in the purchase book as Rs. 6,000.
(II) Amount paid for the proprietor's life insurance premium was debited to 'General Expense Account'.
(III) Goods amounting to Rs. 2,000 have been returned to Chakravarti, but no enrty has been made in the books.
(IV) An excess debit of Rs. 4,500 has been made in account of X, whereas Y's account has been credited by Rs. 5,000 instead of Rs. 500.
(V) Goods sold to Suresh for Rs. 650 were recorded as Rs. 560 in the sales book.
(VI) Typewriter purchased for office use has been debited to purchases account.
(VII) Wages paid for the construction of building Rs. 15,000 were recorded in 'Wages account'.
(VIII) Goods for Rs. 500 have been taken by the proprietor for his personal use, for which no entry has been passed in the books.