[Gammix]

PHP код:

// take this as parameters of your command like "/pay 100k"
new string[] = "100k";
// working on getting real amount
new amount = strval(string);
if (strfind(string, "m", true) != -1) {
    amount *= 1000000;
}
if (strfind(string, "k", true) != -1) {
    amount *= 1000;
}
// result
printf("amount is $%i", amount); 


Nobody writes like "100k100k", the abbreviations are always in the end like "100k", "100m". So this is the easiest and fastest approach i posted.