Quad/Graphics, Inc. reported results for its first quarter ending March 31, 2019.   Net sales increased 3.8% during the first quarter ended March 31, 2019, to $1 billion, primarily from the impact of the Periscope acquisition. Organic sales declined 0.6% after excluding a 4.4% acquisition sales impact. The organic results reflect ongoing print industry volume and pricing pressures partially offset by an increase in paper sales.   Net loss attributable to Quad common shareholders during the first...