How much money will I make during deployment?

We are getting deployed to Egypt to support the infantry battalion there and I was wondering if I should do the deployment before I go through OCS. I calculated that I would make around 40k as a E-4. This includes $600 for BAH, tax free pay for 12 months and the taxable pay during the 3 months pre-mobilization phase. I won't have combat pay but what are some other special payments that I may get and how much would I make in the 15 month period? Thanks