Cost was the 'decisive/deciding/determining factor' in their decision. [=the most important reason for their decision]
The 'deciding factor' was cost. [=the decision was based on cost; the least expensive option was chosen]
Costs increased/decreased by a 'factor' of 10. [=costs were 10 times higher/lower than they had been]
(..) PMS? Sheldon can suck on... the Casimir effect. Correct. How does a quantum computer factor large numbers? PMS? - Shor's algorithm. - Correct! . times ten to the seventh ergs per calorie. (..)2008 TvShow: The Big Bang Theory Title: The Bat Jar Conjecture Season: 1 Episode 13