Want capacitors of tolerance <= 5% for lowest possible cost

• Polymer caps have poor tolerance - lowest is 10%
• Niobium oxide capacitors only available for values above 2.2uF
• Mica capacitors are over-engineered, voltage rating of 500V, ~$80.00 for 47nF
• MLCC (Multi-layer ceramic capacitors) a bit too expensive, 47nF @ 5% tolerance is ~$1.00 at lowest end
• Tantalum Capacitors - lowest tolerance is 10%
• Will use film capacitors at 5%

Finished sourcing all capacitors and resistors for filter sub-circuits, total cost of components will be $28.39