Ranking within two categorical variables

[twix17]

Hello Community,

I am trying to give a rank to a product in the order they appear on my table. Here is my data Have 

customer_Id	order_id	order
a	168	TV
a	169	TV
a	170	TV
a	171	Radio
a	172	Radio
a	173	Radio
b	174	TV
b	175	TV
b	176	TV
b	177	TV
b	178	TV
b	179	TV
c	180	TV
c	181	TV
c	182	Radio
c	183	Radio
c	184	Radio

And below is my data Want.

Id	order_id	order	Rank
a	168	TV	1
a	169	TV	1
a	170	TV	1
a	171	Radio	2
a	172	Radio	2
a	173	Radio	2
b	174	TV	1
b	175	TV	1
b	176	TV	1
b	177	TV	1
b	178	TV	1
b	179	TV	1
c	180	TV	1
c	181	TV	1
c	182	Radio	2
c	183	Radio	2
c	184	Radio	2

Thanks for helping.

[PeterClemmensen · Accepted solution]

Try this

data have;
input customer_Id $ order_id order $;
datalines;
a 168 TV
a 169 TV
a 170 TV
a 171 Radio
a 172 Radio
a 173 Radio
b 174 TV
b 175 TV
b 176 TV
b 177 TV
b 178 TV
b 179 TV
c 180 TV
c 181 TV
c 182 Radio
c 183 Radio
c 184 Radio
;

data want;
   set have;
   by customer_Id order notsorted;
   if first.customer_Id then rank = 0;
   if first.order then rank + 1;
run;

[twix17]

Thank you this works perfectly.