Some tips about TIPS

Hi everyone,
In order of saving grandpa (dad) the most money, we are going to prepay gratuities.
The amounts (the standard requested amount) are $12 per person per day, whether adult, child or baby. He will prepay our room accounts so it will be all taken care of in advance. It also works out better this way because people were listed in rooms according to what would save the most money. So some children will be listed in others' rooms. This way each family will know exactly what to pay and have one amount and one person to get it to.
So for the 7 day cruise, here is the following amounts total depending on the family size:

2 people :$168.00
3 people: $252.00
4 people: $336.00
5 people: $420.00
6 people: $504.00

Thanks so much! We will probably start prepaying these gratuities to the ship around a month before sailing. :)