Allistair Corp. is a local service-oriented company. All of its sales are on account. If Allistair's "Accounts Receivable" balances on 1/1/X1 and 12/31/X1 were $18,000 and $10,000, respectively, what can we determine about the dollar amount of sales on account relative to the dollar amount of cash collections on account for the year? Select one: a. Sales on account were higher than cash collections on account. O b. Sales on account were lower than cash collections on account