can someone explain the usage of the credit terms 1/10, n/30? I'm not clear on how its used to determine sales discounts.

A company that uses a peretual inventory system sold $400 of merchandise on July 23 with credit terms 1/10, n/30. The purchaser paid the amount due on July 30. Which journal entry will the selling company record on July 30? Debit Cash $400; Credit Sales Discounts $4; Credit Accounts Receivable $396 Debit Cash $400; Credit Accounts Receivable $400 O Debit Accounts Receivable $400; Credit Sales Discounts $4; Credit Cash $396 Debit Cash $396; Debit Sales Discounts $4; Credit Accounts Receivable $400. Question 13 2 pts Using the same facts as in number 12 above, but assume that the purchaser pays the amount due on August 8. Which journal entry will the selling company record on August 8? Debit Cash $400; Credit Sales Discounts $4; Credit Accounts Receivable $396 Debit Cash $396; Debit Sales Discounts $4; Credit Accounts Receivable $400 Debit Accounts Receivable $400; Credit Sales Discounts $4; Credit Cash $396 Debit Cash $400; Credit Accounts Receivable $400