Need to sum based on two conditions

Hello,
Please check my requirement and reply if you can. Thanks a ton!

Case I
Type Group Description Item Type Price
Core N Product1a Base 5,767.20
Core N Product1b Incre 5.77
Extended N Product2a Setup 0.00
Extended N Product2b Base 4,374.00
Extended N Product2c Incre 4.37
Extended N Product3a Base 200.00
Extended N Product3b Incre 2.00


Case 2
Type Group Description Item Type Price
Core Y Product1a Base 10,141.20
Core Y Product1b Incre 10.14
Extended Y Product2a Setup 0.00
Extended Y Product2b Base 0.00
Extended Y Product2c Incre 0.00
Extended N Product3a Base 200.00
Extended N Product3b Incre 2.00


I am looking for this:
If
Type = Core
Group = Y and
SUM all same item types' prices into the price column of the corresponding core row. (i.e. sum all base prices, sum all incre prices etc)
Case2 table shows my expected result.

Can someone please help?

-M