An entity has the following invoices in a batch:

Invoice #

Product

Quantity

Unit Price

201

F10

150

$5.00

202

G15

200

$10.00

203

H20

250

$25.00

204

K35

300

$30.00

Which of the following numbers represents the record count?

a. 1

b. 4

c. 810

d. 900