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 price0310(amount) {
var res =  (amount * 5);
return res;
}