Answer:
$6.10
Step-by-step explanation:
Given the fabric store sells the fabric for $6.97 per yard
Given that a customer buys 7/8 yard of fabric.
Let the cost the customer pays be x then


on cross multiplication we get

x=6.01
Therefore the amount the customer should pay is $6.01
638 divided by 11= 58. 58x9=522
0.84(20)=$16.80
700/100=7
7(1.02)=$7.14
$7.14+16.80=$23.94 in total