Getting position of an item in a list

[JumboCactuar]

Hi,
sorry title doesn't really explain it well:

I have data like below (100k + rows)

Item Code	Seller	Price
FR11	ABCTech	16.49
FR11	KLG	15.19
FR11	JustPro	15.11
FR11	MapLtd	14.99
GR44	KLG	38.99
GR44	ABCTech	36.49
GR44	JustPro	35.99
ZD16	KLG	12.99
ZD16	JustPro	12.89
ZD16	ABCTech	12.49
PG20	JustPro	22.79
PG20	ABCTech	21.99
PG20	MapLtd	19.99
PG20	KLG	18.49

It is always sorted like above (grouped by item, then by price high to low)

I need to find out the following:
Which Position JustPro is in the list and price difference from 1st position

From the above - expected output is:

Item Code	Position	Price Difference
FR11	3	1.38
GR44	3	3
ZD16	2	0.1
PG20	1	0

also if possible to calculate the price difference between 1st + 2nd for every item

doable with just formulas ?

appreciate any help

 

[JumboCactuar]

Thanks @Fluff
Working though still quite slow with large dataset

Roughly 2-3 mins from 75000 rows

 

[Fluff]

I wouldn't expect it to take that long, but as I have no data I can't test it.