You need a programmer to work with the site

Good afternoon! My name is Sergei. I am the manager of the online store 33Sport for the sale of auto parts. The site works on a bitrex. Heres TK itself:
Technical task
We must have a warehouse (in Bitrix) in this warehouse will be leftover goods (which will be reserved at payment of the order, and to be debited from the warehouse when the order will be shipped).
We must have suppliers (various suppliers that will be assigned to drivers and product manager)
Documents are the most interesting
For example, there is an order with the products of the supplier "Stinger", it is not in stock, the product manager make an order to the supplier. This order should somehow fall into the program to the driver, for which the supplier is assigned. The driver goes to the supplier, buys the goods from Stinger, and during the purchase fixes the purchase price in the tablet and automatically arrives it in the warehouse.
And all this thing should take place automatically.
That is, we have a whole section of stinger, we will fix it as a supplier "Stinger" and already when paying the order with a machine gun, it should fall to the driver or product manager in the tablet.
Also, after the order is fully formed, we need to write off this item from the warehouse. This process should take place with a machine when the order status changes - "Executed."
Drivers report, daily:
The report is printed, it includes a complete list of purchased goods from all pasters with purchase prices.
Earnings report, weekly:
In this report we should see
The number of orders executed,
The amount of orders sold,
Purchase amount of orders
Total profit for the selected period