<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr" data-setdir="false">Hello</div><div dir="ltr" data-setdir="false">I want to ask if there any available document describe the mathematical equations for the outputs. i.e what is the equation they used to calculate QVENT or QTCOMO? </div></div></body></html>