Arrive at the customer's house for an initial service of: 4.0 Ton A/C Up flow A-Coil, Nitrogen Leak Test Up To 7.5 Tons, Clean Condenser, Coil With Deep Acid Wash, and Refrigerant Charge 3 To 6 LBS R-410A. I proceeded to review A-coil Model and series to order the unit. I explained to the customer that when replacing the A-COIL we have no guarantee for this job because in the future it may have this problem again. I gave him several recommendations to replace his unit. The customers agreed to listen to the options. I offered him a Bosh High efficiency heat pump system as a premium option, and I offered him an Amana 4.0 ton system. The customer opted for the 4.0 ton Amana system. I recommended that customers replace the unit $19,501.59, but the customers spoke with Frank and approved leaving all the work with tax included at $17,000. The customer proceeded to pay the 50% deposit of $8,500. He made the payment by PayTrace of $3,555.41 to complete the $8,500 because he had already paid