A sale of merchandise on account for $28,000 is subject to a 7% sales tax. (a) Should

Question:

A sale of merchandise on account for $28,000 is subject to a 7% sales tax.
(a) Should the sales tax be recorded at the time of sale or when payment is received?
(b) What is the amount of the sale?
(c) What is the amount debited to Accounts Receivable?
(d) What is the title of the account to which the $1,960 ($28,000 x 7%) is credited?