I was going off a 3# bag of DME and 3.3# can of LME... Going from a huge bulk container to single pound container is not a like comparison. It's like comparing getting grain from the LHBS in a 1# bag compared with the per pound pricing you see when buying a full sack as part of a group grain buy. Turns out, you actually need 1.26x LME to get the same gravity numbers from LME.
BTW, I went off prices from Rebel Brewer, where a 3.3# can of LME is $11.95 and a pound of DME is $3.69/#. That means the LME is #3.62/#. With the higher amount of LME needed, you'll end up spending more to get the same gravity addition to a batch.
BTW, I know LHBS' will offer different extracts, and grains, at different prices. If they don't purchase enough of one, or the other, the costs will be higher for you. Still, with the per pound pricing from Rebel being withing 7 cents of each other it makes you rethink things.