Basics of Engineering Economy 2nd Edition by Anthony Tarquin,Leland Blank

Exercise 6

For 2012, the USDA determined that "The Twelve Days of Christmas" cost index was $101,120, based on prices of the 364 items listed in the classic carol. If the "True Cost of Christmas" index rose by 4.4%, ( a ) at was the value of the index in 2011, and ( b ) seven swans-a-swimming increased by $700 to $6300, what was their percentage increase