ohm’s law

I need some help w ohm's law. I understand the basics. and can figure out simple stuff. But what I'm trying to do has some extra variables I'm having trouble with. I sure there pretty simple if you know what your doing. But I don't. Basically I have 4 circuits of LED's I'm putting in my daughter's 96 Mustang. I got them from http://www.oznium.com/led-flex-strips & http://www.besthongkong.com/index.php?cPath=21_71. The OZNIUM site says's no resistors are need for install, but I'm not buying it. I have to much work in this project to blow it for the lack of a .29 cent resistor. From what I can figure out a 100 ohm resistor is what I need, what I'm having a problem with is the wattage req. I'm using blue LED's, which I believe have about a 3.3 forward voltage rating. All sets are wired in parallel as follows.

1st set - 5 strings 48cm(19") ea, 48 led's in ea string setup in sets of 3 = 16 x 3 leds ea w/320 mA for ea string & 3.3 forward voltage on ea LED. 

2nd set- 4 strings 24cm(9.5") ea, 24 led's in ea string setup in sets of 3 = 8 x 3 leds ea w/160 mA for ea string & 3.3 forward voltage on ea LED. 

3nd set - 4 strings 12cm(4.7") ea, 12 led's in ea string setup in sets of 3 = 4 x 3 leds ea w/80 mA for ea string & 3.3 forward voltage on ea LED. 

4th set - 2 strings 6cm(2.4") ea, 6 led's in ea string setup in sets of 3 = 2 x 3 leds ea w/40 mA for ea string & 3.3 forward voltage on ea LED. 

Any help in how to break this down and figure it out would be greatly appreciated, both in this project and any other crazy idea I might come up with.

Seeker