debit cost of sales
credit cash / bank
There is no journal entry for forecasting sales rather journal entry is made for actual sales when they occur.
[Debit] Sales Promotion expenses xxxx [Credit] Cash / bank / goods etc xxxx
expense
debit cashcredit sales revenue
When recording a journal entry for a sales account, ensure that the sales are strictly done on credit terms.
Sales(debit) and income summary (credit)
Debit cash / bankCredit sales revenue
Debit accounts receivableCredit sales revenue
Cash a/c Dr. To Sales a/c
Debit accounts receivable / bank / cashCredit sales revenue
[debit] sales returnscredit cash / accounts receivable
Debit Cash $XXX Credit Sales $XXX