1st method
1) make images of currency coins say 0.05,0.10,0.25,0.50,1,2,5.
2) then pick coins and make a big number
2nd method
generate random number between 100($1),1000($10) then divide by 5(5c resolution) and store in "aaa" then multiply "aaa" by 5 then divide by 100 to get the $xx.xx value