Zoho Creator Sales Order App to integrate with Zoho Inventory. (Zoho Expert Only)

I have alot of work and integrations for zoho one. This is the first job. I need to create a sales order app which will be used on my phone to integrate and push sales orders through to zoho inventory. I couldn't customize the current inventory app included with zoho inventory so will you need to make one in creator. You will need to do the following things: When scanning simple products, they enter automatically as a qty of 1 and I will be able to see all scanned items so far in a list. For example, if i scan 10 products in a row in the order I scan them, I will not have to touch the phone at all. But will be able to click on one of these lines if the cutomer asks for more that one of that item. I will also be able to custom notes about the product if the customer has any special requirements about that product. When scanning a variable product, I will want that line to automatically popup with some check boxes where i can select the length and quantity and also write notes. Next to all quantity check boxes, I would like to have the existing stock level for that item. There will also be a + and minus field to increase or decrease the quantity. At the bottom of the sales order there will also be a place for notes about the whole order. All product details will also be displayed when clicking on a product. Also an option to email this list to the customer as a quote. When submitting, these orders will go though to zoho inventory as a sales order or quote.