On January 10, 2020, Perez Co. sold merchandise on account to Robertsen Co.
for $15,600, n/30. On February 9, Robertsen Co. gave Perez Co. a 10%
promissory note in settlement of this account. Prepare the journal entry to
record the sale and the settlement of the account

The journal entry is the method/technique that is  used to record all the  financial transactions incurred  by a company into the journal

Explanation:

The journal entry is the method/technique that is  used to record all the  financial transactions incurred  by a company into the journal

The journal entry to record the sale and the settlement of the Account is shown below

On January 10, 2020, Prez Co. sold merchandise on account to Robertson for $15,600, terms n/30.

Dr Accounts Receivable 15,600

Cr Sales 15,600

On February 9,Robertsen Co gave Prez Co. a 10% promissory note in settlement of this account.

Dr Notes Receivable 15,600

Cr Accounts Receivable 15,600

b. a single paragraph.

a paragraph is a series of sentences that are organized and make sense, and are all related to a single topic . almost every piece of writing you do that is longer than a few sentences should be organized into paragraphs. this is because paragraphs show a reader where the subdivisions of an essay begin and end, and thus the reader see the organization of the essay into subjects in order to be able to understand its main points.

answer; comparing the additional benefits and costs;