// Updates the finishing set
public void UpdateFinishingSet(string firstCombo, string secondCombo, BikeStock stock)
{
double temp = 0;
if (stock.FinishingSetCost != 0)
{
Cost = Cost - stock.FinishingSetCost;
}
temp = stock.FinishingSet(firstCombo, secondCombo);
Cost += temp;
stock.FinishingSetCost = temp;
}