Set up the correct write-off from the warehouse of balances when there are two or more identical items with different sizes in one order and simplify the procedure for reserving goods

Good afternoon, we are primarily interested in (hereinafter in order of priority) 1. In cases where there are several absolutely identical products in one order, we want to be able to choose from which balances we will write off. Now the program writes off the balances as it sees fit or from the total amount according to the logic given to it, and therefore, in reality, the footage in the balances does not match Galya wrote: does not go out to reserve one model in several footage. http://prntscr.com/pt6iuw for example, I need to reserve goods with article numbers 5196 in several sections, the program reserves only in one section http://prntscr.com/pt6gwf https://box.webproduction.ua/admin/customorder/issue/2015238480/edit/ 2. For ease of use. Make a button in the table of order products, when you click on it, a sign in the following style will fly out. Make: a drop-down list with possible options for the reserve. Only balances are available in the selection variants whose unreserved pr