about the k m b, on your main script, you use it to multiple if the person use

!calc 33K+44K , then the script will recognize that this is 33,000+44,000

we just used $replace, on this case, to replace k for 1000, m 1000000, b *1000000000

so the $calc identifier will multiply, in this case

$calc(33*1000) and 33k, will become 33,000