Can you set array for Vlookup or Index/Match using Offset?

Can't seem to figure this one out...

A	B	C	D
Cust1			Cust2
Invoice1	$50		$100
Invoice2	$50
Invoice3	$100
Total	$200
Cust2
Invoice4	$100
Total	$100
Cust3
Invoice10	$60
Invoice13	$100
Total	$160

From the above table, when I choose cust2 in D1, I want D2 to yield "$100" which is the total for customer2.

I can find cust2 from Column A using match and then maybe create vlookup array with Offset function??

Here's my failed attempt.
'=INDEX(B:B,MATCH("TOTAL",OFFSET(ADDRESS(MATCH(D1,A:A,0),1,4,1),0,0,1000,1),0),1)

Help me!