The edge roughness of slit paper products increases as knife blades wear. Only 2% of products slit with new blades have rough edges, 2% of products slit with blades of average sharpness exhibit roughness, and 4% of products slit with worn blades exhibit roughness. If 25% of the blades in the manufacturing are new, 60% are of average sharpness, and 15% are worn, what is the proportion of products that exhibit edge roughness? Round your answer to four decimal places (e.g. 98.7654).
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