Company X sells on a $2/15,$ net $90$ basis. Company Y buys goods with an invoice of $$3,500.$ A$)$ How much can company Y deduct from the invoice if they pay within $15$ days? B$)$ How many extra days of credit can company Y receive it is passes up the cash discount? C$)$ What is the effective annual rate of interest if Y pays on the due date rather than in $15$ days?