i_type p_type; /* product item type, or I_NONE if level */
int p_level; /* level index (NAT_?LEV), or -1 if item */
int p_cost; /* dollars / product unit */
i_type p_type; /* product item type, or I_NONE if level */
int p_level; /* level index (NAT_?LEV), or -1 if item */
int p_cost; /* dollars / product unit */