(a)=>sales tax= 6.5% of total cost which is equal to (6.5*29.99)/100
= $1.95
(b)=>shipping = 15% of total cost which is equal to (15*29.99)/100 = $4.5
total cost plus shipping = 29.99+4.5= $34.49.
(c)=>if $34.49 is greater than 35%, that is if $34.49 is greater than (35*29.99)/100 which is equal to $10.5, therefore we see that total cost plus shipping is greater than 35%. So we receive 10% discount of $29.99, where 10% discount of $29.99 is $2.999, therefore the new cost will be $26.99. If so, the new total cost plus shipping is $26.99+$4.5, which is equal to $31.49.
therefore, the new total cost plus shipping is $31.49.
