Calculate

income of $.00 per at
income givings per year givings per month givings per week
 1%   $21,000 $210.00 $17.50 $4.04
 3%   $39,000 $1,170.00 $97.50 $22.50
 5%   $52,000 $2,600.00 $216.67 $50.00
 7%   $75,000 $5,250.00 $437.50 $100.96