public void Purchase()      //Delete option after purchase
    {
        PI = GameObject.FindWithTag("Player").GetComponent <PlayerInformation>();

        if (PI.Credits >= S.Cost)
        {
            PI.Credits -= S.Cost;
            GameObject.FindWithTag("ShopPanel").GetComponent <ShopScreen>().P.PlayerReputation += Mathf.RoundToInt(S.Cost / 10f);
            PI.GetComponent <FleetInfo>().Ships.Add(S);
            GameObject.FindWithTag("ShopPanel").GetComponent <ShopScreen>().Refresh();
        }
    }