The buyer won't pay the supplier until next month. This is a liability to the buyer. This amount can be recorded as accrued expense or accounts payable. On the other hand, the supplier has not sent the invoice, so it should be accrued expense.
Both accounts payables and accrued expenses are liabilities. Accounts payable is the total amount of short- term obligations or debt a company has to pay to its creditors for goods or services bought on credit. With accounts payables, the vendor's or supplier's invoices have been received and recorded.
On the other hand, accrued expenses are the total liability that is payable for goods and services that have been consumed by the company or received. However, accrued expenses are those bills in which an invoice or bill has not yet been received. As a result, accrued expenses can sometimes be an estimated amount of what's owed, which is adjusted later to the exact amount, once the invoice has been received.
Conversely, accounts payable should represent the exact amount of the total owed from all of the invoices received.

The quantity of aluminium Apple needs to buy is calculated as follows:
Quantity needed for production + the inventory needed at the end of the year - inventory at start of the year That formula is quantified as: 200 + 54.8 - 27.4 = 227.4

Technical standards are often produced by a national or international body such as British Standard Institute (BSI) LO 3, AC 3.1

Primary activities consist of inbound logistics, operations, outbound logistics, sales & marketing, service.
Second activities consist of firm infrastructure, human resource management, technology development and procurement The following graph illustrate the value chain (Source: Smartsheet) Graphical user interface, diagram Description automatically generated

Picking and delivery components is inbound logistics.
Maintenance is an example of operations activity.
Sourcing transportation services is an activity of procurement
Assembly design is an activity in research and development (Technology) Recruiting is an activity of human resource management