For ultimate POS.sometimes there are internet issues at my shop so its difficult to be connected always to be connected to the internet. i dont want to install it on the local pc because i have to able to see the sales and reports information from anywhere. Will you be able to build a ui just to put the sales in the shop offline and it sync information (flush it) when it gets connected to the internet? like a PWA app. Please let me know how much will this cost if you can do it ?