Loretta bought a new guitar for $1,000 including sales tax of 9%. How much did the guitar shop charge for the guitar excluding sales tax and how much does the guitar shop owe in sales tax as a result of this sale?

A. $917 for the guitar and $83 for sales tax

B. $1,000 for the guitar and $90 for sales tax

C. $900 for the guitar and $100 for sales tax

D. $1,000 for the guitar and $100 for sales tax