$7$:$18$

$.$ Il

$18$

$\backslash$table$[[$Sheet$\text{'},$Sheet?,Sheet$3,],[$Purchases$],[$Date$,$Description,Vendor,Total,Employee$],[\frac{1}{1}\frac{?}{08},$printer paper,Papermart,$300,$Sue$],[\frac{1}{16}\frac{?}{08},$books,Borders,$250,$Mary$],[1/31/08,$envelopes,OfficeMax,$375,$Tom$],[\frac{2}{15}\frac{?}{08},$legal paper,OfficeMax,$300,$Dave$],[\frac{3}{1}\frac{?}{08},$letter paper,OfficeMax,$400,$Gary$],[3/16/08,$bond paper,OfficeMax,$400,$Sue$],[3/31/08,$tape,Staples,$25,$Mary$],[4/15/08,$folders,Staples,$25,$Tom$],[\frac{4}{30}\frac{?}{08},$pencils #$1,$Staples,$10,$Dave$],[5/15/08,$pencils #$2,$Staples,$10,$Gary$],[5/30/08,$computer model # $123,$Dell,$2000,$Sue$],[\frac{6}{14}\frac{?}{08},$computer model # $234,$Dell,$2200,$Mary$],[6/29/08,$computer model # $345,$Dell,$1800,$Tom$],[\frac{7}{14}\frac{?}{08},$pens black,Papermart,$50,$Dave$],[\frac{7}{29}\frac{?}{08},$pens blue,Papermart,$50,$Gary$],[\frac{8}{13}\frac{?}{08},$pens red,Papermart,$25,$Sue$],[\frac{8}{28}\frac{?}{08},$disks,Staples,$100,$Mary$],[\frac{9}{12}\frac{?}{08},$books,Borders,$25,$Tom$],[\frac{9}{27}\frac{?}{08},$books,OfficeMax,$35,$Dave$],[\frac{10}{12}\frac{?}{08},$printer,Best Buy,$245,$Gary$],[,,,,],[,,,,],[1,$Total amount of purchases from Dell,,$],[2,$Total amount of purchases from OfficeMax,$],[,,,,],[,$Total amount of purchases from Papermart,$],[4,$Total amount of purchases from Staples,,$],[5,$Count the number of purchases placed by Tom,$],[6,$Count the number of purchases from Staples,$],[,,,,],[7,$Total amount of purchases for pens and pencils,$],[8,$Total amount of purchases for books from Borders,$],[9,$Total amount of purchases that took place in July,$],[,,,,],[10,$Average amount spent on computers,,$],[11,$Total amount spent on black and blue pens,$],[,,,,],[12,$Total amount spent at Staples during March,$],[,,,,],[13,$Total amount of purchases that Mary placed,$],[14,$Total amount of computer purchases ordered by Sue,$],[,,,,],[15,$Count the number of$,$ses that tor,te$,]]$