How To Input Price Unit On A Digital Scale To Effectively Sell/Refill Cooking Gas In Nigeria?

Good day all, due to the present situation in the oil and gas industry in the country, many cooking gas sellers in Nigeria may need help, due to the current LPG gas price @ N1,200. Some LPG cooking gas sellers using digital scale in Nigeria are finding it hard to get what amount should they inputs at 'unit price' to get the right amount at the end.

Please, read the content to the end to get through this explaination. 

if you sell N1,200 per kg...you don't have to put any amount, all you need to do to is to "ON" and wait till the scale read to "0" at the kg side, which is up. Then put the cylinder ontop of the scale, press the tab which is the second button on your scale, then if the consumer want to buy N1,500 only, you stop your refill pile at 1.3kg (which will show on the scale..1.30 at the kg side)

You can't input the price again....just use your calculator ....or count it back

Hope you understand it. Thanks for reading.