results table sample

my results table will be somewhat like this:

			Length of Fungal Growth (mm)
Group	Category	Material	Day 1	Day 2	Day 3	Day 4	Day 5
1	Meat	Beef
		Chicken
	Fruit	Apple
		Orange
	Vegetable	Beetroot
		Celery
	Grain	Wholemeal Bread
		White Bread
	Dairy	Hard Cheese
		Soft Cheese
2	Meat	Beef
		Chicken
	Fruit	Apple
		Orange
	Vegetable	Beetroot
		Celery
	Grain	Wholemeal Bread
		White Bread
	Dairy	Hard Cheese
		Soft Cheese