AutoHotkey function to perform penny rounding

PennyRound.ahk

pennyRound(val)
{
	;Performs penny rounding on inputted float, and
	;returns calculated amount.
	
	sub := SubStr(val, 0, 1)
	subMult := round((sub * 0.01), 2)

	if (subMult <= 0.02) {
		price := round((val - subMult), 2)
		return price
	}
	else if (subMult > 0.02 && subMult < 0.05) {
		price := round(round(val, 1) + 0.05, 2)
		;price := round((val + subMult), 2)
		return price
	}
	else if (subMult > 0.05 && subMult < 0.07) {
		price := floor(val*10)/10
		price := round(price + 0.05, 2)
		return price
	}
	else if (subMult > 0.07) {
	
		price := ceil(val*10)/10
		price := round(price, 2)
		return price
	}
	else {
		return val
	}
}