1 the results. me statement for p3.5 The sales revenue, food cost of sales, and guests served for a small fast-food carryout division of a restaurant for the past six months are given as follows: Sales Month Revenue Cost of Sales, Food Guests Served aUAWNE $258,200 $ 96,200 274,800 10,200 104,300 285,600 10,400 110,500 289,400 10,300 113,100 298,300 10,100 118,900 304,600 10,400 123,700 10,500 For each of the six months: a. Calculate average check and average costs of sales food. b. Using these averages, calculate a trend index number. Set the trend in- dex for month 1 at 100% (or 100) and complete trend index numbers for the remaining five months. c. With the index numbers identified, convert sales revenue and cost of sales food from historic to current dollars. d. Comment on the results of your calculations of the three requirements for the six months