$3.00
12 quarters  
6 halfdollars 
8 quarters 10 dimes                 
1 dollar coin, 7 quarters, 2 dimes, 1 nickel

$5.50
2 dollar coins, 6 halfdollars, 2 quarters    
11 halfdollars
 20 quarters,  50 pennies 
9 halfdollars, 4 quarters

$3.75
15 quarters
8 quarters 10 dimes, 1 nickel
2 dollar coins,  2 halfdollars 3 quarters
12 quarters, 7 dimes, 1 nickel

$6.00                                                       
10 halfdollars
  24 quarters  
2 dollar coins, 6 halfdollars, 4 quarters
   8 halfdollars, 8 quarters