Sometimes the temperature does not decrease with height in the troposphere, but increases. Such a situation is known as a temperature inversion. Temperature inversions limit or prevent the vertical mixing of air.
Middle range machines can cost on average $400 and are often multi-function with copier and laser printer capabilities. Finally, high-end machines which offer high speeds, high capacity and high resolution come at a higher price-expect to pay $1000 - $2500 for such a fax machine.
1 Extra pages beyond the allowed amount can be 3 cents - 10 cents apiece, but can cost up to 20 cents - 25 cents a page if you choose to provide a toll-free number (rather than local) to receive your incoming faxes. 2  Some Internet fax services offer a yearly subscription for about $20-$30 for extremely low-volume faxing.hat should be included: Additional costs: 1  With an Internet fax service, , you e-mail your faxes with the document(s) needing to be faxed included as an attachment to the e-mail.