Is there an easy way to calculate what I will be paying? 

Yes: the most accurate way is to call us or email us and request a quote.  We know how to save you money on your Cloud deployment since it is going to be very different from colocation or even other clouds.  Cloud computing should save you money, and we can figure out the most efficient use of it.  Or, if speed is more important that accuracy, we have an online pricing calculator available under the  Services menu.

Can you help estimate the monthly cost for two-dual-core-cpu/16gb and four-dual-core-cpu/16gb? I'm a bit confused about your statement “our usual rate is $(call us)/mb/month of server RAM with equivalent rates for CPU usage since we measure on percentage server utilization.“

This question addresses the essential difference between ENKI and all other colocation service providers today.  ENKI does not lease servers: we are a utility computing service provider.  If you're familiar with Amazon EC2, our service is similar - but much more reliable (see the related blog article ).  We charge on resources used per month, similar to your utility bill.  Our costing model for computing and hence our pricing model is based on the percentage of a standard 4GB per core server that you use, whether that's CPU or RAM.  This is how the number ends up being expressed in Mb-mo (for processor time it is per percent per month).  This is generally in your interest and saves you money.  For example, every customer we've signed so far has come to us wanting to lease an equivalent hardware configuration to the one they currently have.  However, each of these customers ended up using significantly less resources than the total in their pre-existing hardware, while getting equal or better performance.  The reason for this is that when you buy or lease hardware, you have to provision the absolute maximum you could possibly need over the life of the equipment to serve peak loads.  When you buy utility computing services, you pay for what you use, and if you need more, you request it and it's almost instantly available.  In addition, this means that you can provision virtual private data centers of varying sizes any time you want, and destroy them again when you want, and only pay for what you used.  This allows some of our customers to create large demo configurations and then effectively get rid of the hardware they used for the demos when they are done.  If by some chance you end up using all the resources on a full server, our prices are competitive with leasing the servers in a colocated environment with support and installing AppLogic on them yourself.

Why do your servers have 4GB per cores of memory?

In our experience with our customers, this is the maximum memory necessary to address most application needs.  This keeps customers from having to buy resources they don't need.  Lately, a number of industry analysts have agreed that the recommendation for enterprise customers is to provision their servers with 4GB per core if they plan on using them for a variety of tasks.

What do you mean by saying that you charge for the maximum of memory or CPU used?

Since we charge based on the percentage of our server that your application uses, that percentage is determined by the maximum percentage of CPU or memory that your application uses, since the remaining percentage is what can be sold to other customers.   Since most of our customers have a significant number of virtual instances with varying CPU/memory ratios, we add them all up and charge only on the max of the totals, allowing you to have some of your instances with lots of RAM and others with lots of CPU without paying any extra.

Do you have a document explaining how you bill for resources consumed?

Yes, please see our Billing Tutorial