Walgreens Cash Question

I have a Spend $10 get $10 Walgreens Cash offer. I also have a Walgreens Cash balance.

My question is this - If my purchase total is $12, can I use $2 of my existing Walgreens Cash and still receive the Spend $10 get $10 WC promotion? (I won't be using any store or manufacturer coupons and no RR.)

Thanks in advance!