You can calculate it using the numbers they gave above. They use a 100k SPS for an example at 0.1% of 33,333.333 daily drop but the breakdown is -
100k = 0.1
10k = 0.01
1k = 0.001
100 = 0.0001
10 = 0.00001
1 = 0.000001
thus 352 SPS x .00000352% = .11*** vouchers per day time 30 days basically 3.3 vouchers,
you need to add two additional zeros because we are dealing with fractions of a percent
Pretty sure thats right, I'm sure someone will correct me if I am wrong.