Bill Thompson, Chief Financial Officer of Garden Tools, Inc., suspects irregularities in the payroll system, and orders an inspection of "each and every payroll voucher issued since January 1, 1999." Five percent of the payroll vouchers contained material errors. This is an example of .
A. nonparametric statistics
B. nominal data
C. descriptive statistics
D. inferential statistics

The following transactions occurred during july: received $1,000 cash for services provided to a customer during july. received $4,000 cash investment from bob johnson, the owner of the business received $850 from a customer in partial payment of his account receivable which arose from sales in june. provided services to a customer on credit, $475. borrowed $7,000 from the bank by signing a promissory note. received $1,350 cash from a customer for services to be rendered next year. what was the amount of revenue for july?