StatsPerson

To increase more courses under your belt in quantitative topics, the following are highly recommended & essential, as a foundation. 1)Principles of Mathematical Analysis by Walter Rudin (first 7 chapters atleast) 2)Linear Algebra (until Perron Frobenius theory of Non-negative matrices) These 2 will give you reasonably firm foundation, given the circumstances. Wish you well.

Your profile is a decent one for the schools you are aiming at. I am assuming you will apply for the applied Maths degree. wish you well.