using System;

public double compras (double ec, double q, double ef, double ch, double kb, double pb, double refri)

{

    double a = 1.48 * ec + q * 2.98 + 2.18 * ef + 6.5 * ch + 6.7 * kb + pb * 3.2 + refri * 13.9;

    return a;

}

public double desconto (double desc)

{ 

    double a = compras (-25);

    return a;

}

double total = compras (2, 3, 5, 4, 7, 9, 2);

total