On March $31,2019$ and June $30,2019,$ Nonc Brothers reported Accounts Receivable, net of allowance for uncollectibles, of $121$ million and $135$ million, respectively. They close their books quarterly and their fiscal year ends on March $31$st$.$ During the first quarter, Nonc Brothers collected cash from their receivables of $62$ million. They also recognized a bad debt expense of $25$ million during the first quarter. The firm had $37$ million and $42$ million balances in its allowance for uncollectibles on March $31,2019$ and June $30,2019,$ respectively.

How much did Nonc Brothers sell on credit to their customers during the period April $1$ June $30,2019?$