Given,
Sales tax rate=5%
Sales tax on bike=$7
Now, we will find purchase price.
Let purchase price = x
We know given sales tax = 5% of x
Total price = purchase price + sales tax
So,
Sales tax = 5% of x
Now, to find x
So, purchase price is $140.
Total price of bicycle,
Total price = purchase price + sales tax
total price = 140 + 7
=147
Hence, 147 is the required answer.