If Mr Delgado sold 1/3 of his shares of $2,700, then the value of his stock before the sale was
2700 x 3 = $8,100
Since Mr Delgado and Mrs Delgado each owned the same amount of stock before the sale, then the total value of their combined shares before the sale was.
8100 x 2 = $16,200
Hope this helps.