min:     15000 capital + 4000 storage + 75 land;

wheat:     120 capital +  110 storage +    land >= 143;
barley:    210 capital +   30 storage +    land >=  60;

//	¥H¤U¤T¥y¥i¬Ù²¤
//	0 <= capital < +inf;
//	0 <= storage < +inf;
//	0 <= land < +inf;