Yes, the total resources is your EFC.
This is the formula, as presented on the UW financial aid website:
Cost (Student's Budget)
- Student's Resources (the Total Resources you're seeing)
= Financial Need/Maximum Eligibility
For example, my total resources says $1,217 and my expected student expenses is $25,696, so I should receive about $24,479 in financial aid.
Since yours says $15,000, you should receive your expected student expense (I'm not sure how much it is for OOS) minus $15,000 in financial aid.
The numbers aren't definite, though; they can change. This'll just give you an idea of how much you might get if your financial situation remains the same.
The actual awards and award amounts have not been posted yet.