Which internal control(s)would you recommend to prevent the following situations from occurring?
a.While entering the details about a large credit sale,a clerk mistakenly typed in a nonexistent account number.Consequently,the company never received the payment from this customer.
b.A customer filled in a wrong account number on the remittance advice.Consequently,a clerk entered the same number into the system,and the payment was credited to another customer's account.
c.After processing a large sales transaction,the inventory records showed negative quantities on hand for several items.

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The Answer of Which internal control(s)would you recommend to prevent the following situations from occurring?
a.While entering the details about a large credit sale,a clerk mistakenly typed in a nonexistent account number.Consequently,the company never received the payment from this customer.
b.A customer filled in a wrong account number on the remittance advice.Consequently,a clerk entered the same number into the system,and the payment was credited to another customer's account.
c.After processing a large sales transaction,the inventory records showed negative quantities on hand for several items.

Which Internal Control(s)would You Recommend to Prevent the Following Situations