Accounting Principles- Concepts. Conventions: Double Entry System of Book Keeping -Basic terms used in Accountancy – Journal Procedure Merits and Demerits – Ledger posting Procedure Merits and demerits. Cash Book: Simple Cash Book- Double Column Cash Book – Triple column cash book – Petty cashbook – Preparation – Merits and Demerits. Trial Balance: Need- Preparation- Uses- Trading and Profit and Loss Account- Balance Sheet of Sole Proprietary concerns with Simple Adjustments. Depreciation Accounting: Need–Objectives- Straight Line Method and Written down Method – Cash Budget- Need – Objectives – Preparation – Merits and Demerits.