$3.00 
12 quarters
 300 pennies
 30 dimes

$5. 50
22 quarters
500 pennies, 1 half dollar
11 half dollars

$3.75
300 pennies 3 quarters
30 dimes, 1 half dollar, 5 nickles
60 nickles, 75 pennies

$6.00 

60 dimes
600 pennies
24  quarters