How much would it cost to get an iphone 5s and a new framily plan with Sprint?

I'm looking to get a new phone, and was wondering what it would cost to start a new framily plan and get a iphone 5s? It would be a new account and just me on there.

It would cost you $55 a month for one line just for unlimited talk and text and 1GB of data internet. If you wish to add more data internet to the plan it would cost a extra $10 for 3GB of data or $20 for unlimited data internet.

Then you have to purchase the phone that you want. For the iphone 5s the full cost is $650.16. However you can make monthly installments on top of your plan for 24 months to pay off the cost of the phone. For example you would have to pay a extra $27.09 per month for 24 months to pay off for a new Iphone 5s phone.

So here is a bill

$55 a month (unlimited talk and text and 1GB of data internet) + $27.09 = $82.09 before taxes each month for the next 24 months

The framily plan is better if you have more people. If you have 7 people in the plan then each person would only pay $25 instead of the $55 a month. Each line would have unlimited talk and text with 1GB of data.