You need to explain where in the United States and what is being bought.
In the United States, sales tax is different in each state. In addition to state taxes, there can be county and municipal taxes on top of it. There are often differences in taxes between food and non-food.
$249.99 plus tax
One problem: you didn't tell us what the tax was. So, let's make x the tax percent. We end up with 319.97(x+1).
it is about $400 plus tax
Five dollars plus tax would be 5 plus whatever the tax percentage is. If the tax is 10%, $5 plus tax would be $5.50.
what is 29.88 plus tax
69.99 plus tax
105.00 plus tax
a Nintendo wii costs about $249.99 (plus tax of course) in the US
The answer depends on what the tax rate is.
11.98 PLUS tax
Depends on the tax rate. But to illustrate, if the tax is 5%, then 59.99 plus 5%tax = 59.99 + (59.99x0.05) = 62.99. If the tax is 12%, then 59.99 plus 12%tax = 59.99 + (59.99x.12) = 67.19
That will depend on the tax. Multiply 9.98 by 1 plus the decimal equivalent of the sales tax. If the tax is 8%, 9.98 x 1.08 = 10.78