Hello, can you help with these 3 scenarios of this question?

2. 3. In company B, the sales department uses a sales system for processing customer orders, including billing. Twice a month, copies of invoices generated are forwarded to the AR department, who then enters them as sales journals into the accounting system. The AR subsidiary ledger is updated instantly upon posting the sales journals. At the end of each month, the AR department summarises the total debit and total credit amounts posted to the AR subsidiary ledger and prepares a journal voucher. Based on the journal voucher, the GL department posts to the general ledger. In the monthly management meetings, the sales director and finance director often get into argument about what the sales revenue should be, because the reports they generate from the sales system and accounting system respectively do not show the same sales figures. Company C has 10 sales subsidiaries in Asia Pacific. The sales director of each sales subsidiary is empowered to set credit limits for its customers. The credit controller in the HQ notices that there are some common customers among the sales subsidiaries. For these customers, since each subsidiary sets its own credit limits for them, they effectively enjoy a very large combined credit limit. The credit controller thinks that this is a risk to the company and should be controlled. He wants to set a global credit limit, in addition to the local credit limit, for such common customers.