function price0301(amount) {
var res = 0;
if (amount > 1000) { res =  amount * 2 + 4040;} 
 else if (amount > 199) { res =  amount * 5 + 1040;} 
 else if (amount > 100) { res =  amount * 7.5 + 540.5;} 
 else if (amount > 20) { res =  amount * 10 + 290;} 
 else if (amount > 10) { res =  amount * 15 + 190;} 
 else if (amount > 2) { res =  amount * 30 + 40;} 
 else if (amount > 0) { res =  amount * 50 + 0;} 

return res;
}

function price0301(amount) {
var res = 0;
if (amount > 2000) { res =  amount * 0.1 + 398.5;} 
 else if (amount > 500) { res =  amount * 0.2 + 198.5;} 
 else if (amount > 250) { res =  amount * 0.5 + 48.5;} 
 else if (amount > 139) { res =  amount * 0.25 + 111;} 
 else if (amount > 129) { res =  amount * 0.5 + 76.25;} 
 else if (amount > 100) { res =  amount * 0.75 + 44;} 
 else if (amount > 30) { res =  amount * 1 + 19;} 
 else if (amount > 10) { res =  amount * 1.5 + 4;} 
 else if (amount > 2) { res =  amount * 1.75 + 1.5;} 
 else if (amount > 1) { res =  amount * 2.5 + 0;} 
 else if (amount > 0) { res =  amount * 3 + 0;} 

return res;
}

function price0310(amount) {
var res =  (amount * 5);

return res;
}

function price0501(amount) {
var res =  (amount * );

return res;
}