You can leave at 6:39 in the morning and arrive at 11:57 in the morning. This will cost you $492 or 9287.04 pesos. After you arrive you will spend the day looking around and resting, maybe going to the pool.
One of the places i will eat at is Du Mexique. The most pricey thing i saw on there menu is 540 pesos which is $28 in the U.S. Another place to try is Freds House. the cost of the menu VARY but most of the food is around 300 pesos or $15 us dollars.
IF YOU STAY IN THE BEAUTIFUL RIU PALACE HOTEL THE PRICE IS ONLY $348 PER NIGHT which is 6,568.88 pesos. for a whole week it would be $2,436 or 45982.18 pesos. THIS IS SUCH A GREAT PRICE for this amazing hotel! THE HOTEL IS BEAUTIFUL! THE ROOMS ARE VERY BRIGHT AND EXCITING! THERE IS ALSO A WONDERFUL HUGE POOL WITH A BAR LITERALLY IN THE POOL!
There is a 12 hour tour for this and it comes with a breakfast, lunch and open bar. this is $99 for an person. there is food and sightseeing. also this is a 12 hour thing so be prepared for a long day. The driver will either pick you up at your hotel or you will go to a bus top. they will drive you there and make sure you have a swimsuit because there is a beautiful pool you will defiantly want to go into.
You will probably want to dedicate one full day to shopping. There are many great places to go and shop at! I would bring a decent amount of money, maybe around $200 which is 3,775.22 pesos. this money will be used for all the shops you go and visit. I am sure there is a lot you would like to buy in Cancun.