To start, the basic setup is "the more you add, the more you save". So, one line of unlimited talk and text is $50 per month, two lines are $40 each, three lines are $30 each, etc. Adding on unlimited data will set you back $30, or just $20 for 1GB. Or, there is a package plan called "My All-In Plan", which would include unlimited talk, text, and data, plus 5GB of hotspot data for $110 per month.
The new set of plans seems to be needlessly complex, and has a chart that supposedly shows more benefits compared to an "Everything Data" plan, but that seems like a comparison designed to make the new plans look good while being vague. For example, the new plans offer something called the "Sprint Unlimited Guarantee" which the old plans didn't, and that's something you need, right?