My first look at late season division matchups such as this one is Under the total. This one fits. 
Statistically, Dallas is strong on both sides of the ball. But the Cowboys are far better coached on the defensive end. This isn't a rip so much on offensive coordinator Kellen Moore as it is head coach Jason Garrett. 
Dak Prescott has a shoulder injury to his throwing arm. The severity of the injury has come into question. If the injury is serious enough to limit Prescott - and I do believe it will impact him - then this should be a dead nuts Under game. Even if Prescott can throw downfield, I still like the Under. Amari Cooper isn't right either.
Dallas is a running team moreso now that Prescott isn't 100 percent. The Cowboys are going to ride Ezekiel Elliott in this NFC East Division showdown. Philadelphia's strength is its run defense. Only two teams allow fewer rushing yards per game than the Eagles. 
The Cowboys rank seventh in total defense and eighth against the pass. They give up fewer than 21 points on the season. 
Because of multiple wide receiver injuries and no speed at the flanks, Carson Wentz is reduced to throwing short passes to his tight ends and dump off passes to his running backs. If Wentz hasn't regressed this year he sure hasn't shown improvement. 
Eagles home games have averaged just 39.4 combined points. This one should fall in that range, too.