Faith must pay $28 + $5 = $<<28+5=33>>33 for the flour and cake stand.
Her two $20 bills amount to $20 x 2 = $<<20*2=40>>40.
So, she gave the cashier a total of $40 + $3 = $<<40+3=43>>43.
Hence, her change is $43 - $33 = $<<43-33=10>>10.
#### 10