Provided services $900 with cash and rest on account.

a. Debit Cash $450, Debit Accounts Receivable $450, Credit Revenue $900

b. Debit Revenue $900, Credit Cash $450, Credit Accounts Receivable $450

c Debit Services Expense $900, Credit Cash $450, Credit Accounts Payable $450

d Debit Services Delivery $900, Credit Cash $450, Credit Accounts Payable $450

e Debit Cash $450, Credit Accounts Receivable $450, Credit Services Expense $900