Letter Corrosion Prevention, Harrogate re payment by means of Trader's Credit

An undated letter from Corrosion Prevention of 8 Victoria Avenue, Harrogate to Hick Bros of Leeds - "We are availing ourselves of the modern method of payment of accounts by means of the Trader's Credit system".

I can combine P&P providing you wait for an invoice before making payment. Log into . and place the items in your basket, then use the “Request Total from Seller” (do not use the Proceed to Checkout button). I will then weigh your items and send you an invoice. If you are using a mobile app, this facility is sometimes not available and you may need to log in on a desktop or laptop. An alternative way is to click to purchase one item and then choose the continue buying with this seller option. Do not use the Pay Now. Ditto with the next and the next. I can then send you an invoice. Discounts cannot be given once you have paid, so please contact me if you still have a problem.