please can someone help

Part 2 Books and transactions 11.4A J. Fisher, White House, Bolton, is selling the following items at the prices as shown: plastic tubing at f1 per metre, polythene sheeting at f2 per length, vinyl padding at 5 per box, foam rubber at f3 per sheet. She makes the following sales: June 1 To A. Portsmouth, 5 Rockley Road, Worthing: 22 metres plastic tubing, 6 sheets foam rubber, 4 boxes vinyl padding. Less 25 per cent trade discount. 5 To B. Butler, 1 Wembley Road, Colwyn Bay: 50 lengths polythene sheeting, 8 boxes vinyl padding, 20 sheets foam rubber. Less 20 per cent trade discount. 11 To A. Gate, 1 Bristol Road, Hastings: 4 metres plastic tubing, 33 lengths of polythene sheeting, 30 sheets foam rubber. Less 25 per cent trade discount. 21 To L. Mackeson, 5 Maine Road, Bath: 29 metres plastic tubing. No trade discount is given. 30 To M. Alison, Daley Road, Box Hill: 32 metres plastic tubing, 24 lengths polythene sheeting, 20 boxes vinyl padding. Less 331/3 per cent trade discount. Required: (a) Draw up a sales invoice for each of the above sales. (b) Enter them up in the Sales Day Book and post to the personal accounts. (c) Transfer the total to the sales account in the General Ledger