Sauces by$$ Charley, which produces stirfry $$sauces$,$ is developing direct material standards. Each bottle of sauce requires $0\mathrm{.}69$ kilograms of base. The allowance for waste is $0\mathrm{.}70$ kilograms per$$ bottle, while the allowance for rejects is $0\mathrm{.}90$ kilograms per bottle. What is the standard quantity of base per$$ bottle?