Choose the expressions that will help find the total cost of an item that costs $a if the sales tax is 6%. Select all that apply. Multiple select question. cross out A) 1.06 · a, because this multiplies the cost by 100% and by the sales tax to give the total cost. cross out B) a − 6a, because this shows the price of the item without the sales tax. cross out C) 1.6a, because this gives the cost of the item including the 6% sales tax. cross out D) 0.06a + 1a, because this shows the cost of the sales tax and the cost of the item. cross out E) a + 0.06a, because this multiplies the cost by 100%, and adds 6% of the cost of the item.