calculations

A workshop: medical wrap - poultice, ointment, cloth, 10s
	x10 = 10 workshops: 10 m.w. - 10 poultice, 10 ointment, 10 cloth, 10s
B workshop: poultice - 2 herb, bandage, 4s
	Tx2.5 = workshop: 2.5 poultice - 5 herb, 2.5 bandage, 10s
	x4 =  4workshops: 10 poultice - 20 herb, 10 bandage, 10s
C workshop: bandage - cloth, 5s
	Tx2 = workshop: 2 bandage - 2 cloth, 10s
	x5 = 5 workshops: 10 bandage - 10 cloth, 10s
D workshop: cloth - 2 cotton, 4s
	Tx2.5 = workshop: 2.5 cloth - 5 cotton, 10s
	x8 = 8 workshops: 20 cloth - 40 cotton, 10s
E farm: cotton - 2s
	Tx5 = farm: 5cotton - 10s
	x8 = 8 farms: 40 cotton - 10s
F kitchen: ointment - 2 fishoil, 4 herb, 6s
	Tx5/3 = kitchen: 5/3 ointment - 10/3 fishoil, 20/3 herb, 10s
	x6 = 6 kitchens: 10 ointment - 20 fishoil, 40 herb, 10s
G kitchen: fishoil - 6s
	Tx5/3 = kitchen: 5/3 fishoil - 10s
	x12 = 12 kitchens: 20 fishoil - 10s
H farm: herb - 3s
	Tx10/3 = farm: 10/3 herb - 10s
	x18 = 18 farms: 60 herb - 10s