What was the Number of casualties of the crusaders?

Answer 1

Hopefully someone can give you an actual number, but remember something:

Numbers were HEAVILY exaggerated by medieval writers. For example, two armies meet in battle with 5,000 men each. They fight and Army A loses 1000 while Army B loses 3000. Having won, the writers of Army A speak of how they met 30000 enemy in battle and slew all but a handful of them for a loss of 300 of their own. That is a typical synopsis of a battle by a medieval writer. Similarly, the use of 30000 and 300 was not a coincidence, since they loved to use the number 3 due to the Trinity. Simply put, numbers are impossible to gauge before the modern era.