Cantaloup --
This is what is called a 'three-point problem' amongst folks evaluating groundwater hydrology. Please note the geometry of the wells - they form a right-angle with respect to point B. This means you can reduces to a simplified form based on Fetter (1981) and presented in Applied Hydrogeology, 4th Edition (2001), Page 108.
I get the following results:
gradient = 1.668E-03 ft/ft
direction of groundwater flow = Due West (Think it is moving from highest to lowest potential)
seepage velocity = 0.667 ft/day (Please note it is NOT the same as linear velocity)
I can scan my work and post if you need it.
JR