Answer :
Answer:
Briana saved $1.80.
Step-by-step explanation:
When the sales promotion is 20% off.
Cost price is $45
Amount after discount is = [tex]45-(0.20\times45)=36[/tex] dollars
When the sales promotion is 10% off.
Cost price is $42
Amount after discount is = [tex]42-(0.10\times42)=37.80[/tex] dollars
Hence, Briana saved [tex]37.80-36=1.80[/tex] dollars