OK, make it 300 sqf.. easier to calculate.

300 sqf=12x25

Framing at 16in center to center:

floor: 2x6x12:25pc=200

stud:2x4x8: 80pcx3=240 (including interior walls)

post:4x4x10:6pc=60

roof: 2x6x10: 20pc=200

Sub total: 700.

============

Roof:

OSB:22pc=400

Felt and Shingles: 400

Subfloor: 

OSB: 10 pc= 200

Exterior: 

T1-11 siding: 20pc= 800

Facia, soffit, and gutter: 400

Subtotal: 2200

==============

Interior:

Exterior doors(2): 500

Interior doors: (2): 200

Windows(6): 1500

Drywall: 30 pc 400

Insulation (R-13): 500

Subtotal: 2900

================

Electric:

50 amp sub-panel, breakers: 150

12 gauge wires: 300

Boxes, outlets, lights: 200

Electric heating: 200  

Subtotal: 850

================

Finishining:

Paint: 500

Flooring: 600

Cabinets: 500

Subtotal: 1600

=================

Misc. supplies and disposal:

1000

+++++++++++++++++

Total:  9250

Labor:

2 persons full time, you probably can get it done in 15-20 days.