What is wrong with the following code that calculates the cost of an item with tax?

$1.$ tax $=0\mathrm{.}06$

$2.$ cost $=$ float$($input$($How much does your item cost? $))$

$3.$ while$($cost $!=0)$:

$4.$ new$\_$cost $=$ cost $+($cost $*$ tax$)$

$5.$ print$($Total cost is $ $,$ new$\_$cost$)$

$6.$ print$($Goodbye$)$

Multiple Choice

The calculation on line $4$ is incorrect.

The tax amount is incorrect.

Line $6$ should be indented.

The value of cost never changes so this will be an infinite loop.