amazon cloud platform to host a website with say max 200 hits a day. drupal site whats the configuration and how does this work in the rates.?

for a normal drupal site with 200 hits per day i would suggest a normal small instance. it will be sufficient to handle this much of load

a samll instance cost $0.085/hour. for more details you can check here
http://aws.amazon.com/ec2/pricing/

for static content deliver i would also suggest cdn which is also available with aws.

Thanks
what all prices should i consider.

Say i want 2 gb ram and 30Gb space and 1000 Gb bandwidth. what all should i total up.

Can i get any easy way to calculate it please

also can we host any CMS like drupal as well?

you can get this calculated here

http://calculator.s3.amazonaws.com/calc5.html

ec2 provides raw machine where you can install anything. you can also use prebuilt machine images for your purpose. so technically yes, you can install any cms there.

for details on small instance you can check this page

http://aws.amazon.com/ec2/

a small instance is as below

Small Instance (Default) 1.7 GB of memory, 1 EC2 Compute Unit (1 virtual core with 1 EC2 Compute Unit), 160 GB of local instance storage, 32-bit platform

Really tough task calculating. its asking for so many details that have never heard off.. :-(
Can you please help. With approx rates for a simple site
also please mention what you put to calculate so i can also try

you don't require all the complex stuff. just add one small linux instance with 24 hours/day. one elastic ip.

for data in and out i assume 10 gb in and 100 gb out. so this would cost you around $75/month.

if data out is reduced say 10gb then the cost would be $62. you can also shut down the instance when not in use to reduce the cost.

Shutdown instance you mean the server?.
This is for a website does this any use for a website?

What would the ram and processor be for small
Also what is elastic ip do we need one