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#include <stdio.h> #include <stdlib.h> double CalcTax(double cost) { return cost * 0.15; } // Determine shipping cost based on weight double CalcShippingCost(double weight) { double cost; if (weight < 1) { cost = 7.88; } else if (weight < 6) { cost = 14.32; } else if (weight < 10) { cost = 21.11; } else { cost = 25.5; } cost = cost + CalcTax(cost); return cost; } int main(void) { double weightOfPackage; // User defined package weight printf("Enter package weight: "); scanf("%f", &weightOfPackage); printf("Shipping cost: $"); printf("%.2f\n", CalcShippingCost(weightOfPackage)); return 0; }