for 4D and TOTO,i donate average about $100.
depending on the prize for TOTO,if 3mil and above,will buy more else about $20 (4 sets of own numbers)
$12 each week for 4D,if have some sum-shui numbers,will donate more.
these 2 years,the returns not so good,LOST.
before that,each year also manage to make some PROFITS.