What is the tax on the Iphone 5C at Target and Radioshack?

With Target mobile online and Radioshack.com, it shows that there are $0 in taxes for my zip code, with any android phone. Is that only for online purchases? Target has the Iphone 5C for $49.99 w/ a $30 gift card and at Radioshack it is $50. I'm not sure what either of those prices would be with tax. When I bought a cell phone with Cricket wireless, from Radioshack.com in Dec 2012, I payed $5.25 in taxes.

If you purchase anything in a retail store, you will be charged tax on the item. The tax rate varies widely from place to place, so no real way to give you that info. If you plan on 10% of the purchase price, you will be in the ball park.

It is also quite probable that your state has a tax code that says you must pay sales tax on anything you purchase online, unless the seller charges that tax at the time of sale. The good news is that there's no real workable way to enforce that tax code, so it is universally ignored. Radio shack will probably charge tax on any purchase either online or in person, even if it says no tax right now. Target may be able to get away with not charging, it depends where you live.