Coney Island Mistake

Three errors plague this storefront. The apostrophe in Coney's is wrong. The decimal point and cent sign cannot coexist if the coney costs just under a dollar on Tuesdays. The apostrophe in Tuesday's is incorrect if they mean to say,"On Tuesdays we have coneys that cost $.99."  If they mean to say, "Tuesday's $.99 coney is here," then the sign is correct.