1. Hurricane Katrina Help the children!

2. Helping the children Build a model of a playhouse Find the cost of the models: Katrina.xlsKatrina.xls Compare the costs of the models A donor has been identified!!!!

3. A Cape Code Model What are the building features for this house? Trimming Dutch door Shutters

4. A Victorian Model What are the features of this house? Child dutch door Flowerboxes Trimming

5. ItemQuantity Siding72 Windows (large)2 Shutters4 Flowerboxes2 Windows (small)2 Childrens Dutch door (40x20) 1 Adult Dutch door (61x34)1 Screws, latches, handles, nails1 Trimming (metallic)43 Trimming (plastic)43 Flooring36 Shingles82 Paint2 Labor16 The Cape Cod Model The Victorian Model ItemQuantity Siding140 Windows (large)17 Child Dutch door (40x20)1 Adult Dutch door (72x48)1 Flowerboxes8 Screws, latches, handles, nails1 Trimming (metallic)92 Trimming (plastic)92 Trimming (wooden)92 Flooring81 Shingles145 Paint4 Labor32

6. Your turn to work on the problem How much do these playhouses cost to build?

7. ItemQuantity Siding72 Windows (large)2 Shutters4 Flowerboxes2 Windows (small)2 Childrens Dutch door (40x20) 1 Adult Dutch door (61x34)1 Screws, latches, handles, nails1 Trimming (metallic)43 Trimming (plastic)43 Flooring36 Shingles82 Paint2 Labor16 The Cape Cod Model The Victorian Model ItemQuantity Siding140 Windows (large)17 Child Dutch door (40x20)1 Adult Dutch door (72x48)1 Flowerboxes8 Screws, latches, handles, nails1 Trimming (metallic)92 Trimming (plastic)92 Trimming (wooden)92 Flooring81 Shingles145 Paint4 Labor32

8. Spreadsheet Fundamentals Avoid numeric values in formulas Refer to values by cell referencing Use built in formulas Be careful with cell referencing (absolute vs. relative) =sum(B2:B10)/8 =sum(B2:B10)/B1 =average(B2:B10) = $B$3*B5 + $C$3