suspense account

l met such a question

a suspense account shows credit balance of $130.Which of the following could be due to?

A Omitting a sale of $130 from sales ledger

B recording a purchase of $130 twice in the purchase account

The coorect variant is B
l can understand why it is
but omitting a sale of $130 from sales ledger(A)

here,the result is not that debit side is more than credit side??
and thats why don’t the suspense account create credit balance???