APFill - Ink Coverage Meter 3.8 is a Desktop Publishing product from avpsoft.com, get 5 Stars SoftSea Rating, Ink usage is usually described by the printer manufactures as so many pages of A4 using 5% coverage. APFill Ink & Toner Coverage Meter program helps you calculate ink coverage (calculate toner coverage) on the page before printing expressed as a percentage. So you will be able to estimate cost price of the page.
Key features:

Measure the ink coverage of the highlighted screen area (while previewing the page in a graphic editor before printing, for example.)
Measure the ink coverage of every page or average document coverage of a PostScript or PDF file (*.ps,*.pdf) with CMYK separation (up to 8 color spots). To use this feature, you will also need to install GPL Ghostscript 8.61 for Win32.
Measure the perimeter of a selected area of the screen.
Selected area surface measurement (The "Area (auto)" feature allows you to measure the area filled in with a specified color on the screen.
Area measurement results can be displayed either in pixels or in user-defined units, which can be set up in "Measuring Scale". The license of this design software is Free Trial Software, the price is $49.00, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of APFill - Ink Coverage Meter, you can buy this design software.