Classify each cost items$(1-8)$ as one of the business functions of the value chain.

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Part $1$

Cost Item

Value Chain Business Function

$1.$

Cost of oil for the deep fryer

Research and Development

$2.$

Wages of the counter help who give customers the food they order

Customer Service

$3.$

Cost of the costume for the king on the Burger King television commercials

Marketing

$4.$

Cost of children's toys given away free with kids' meals

Design

$5.$

Cost of the posters indicating the special "two cheeseburgers for $$2"$

Design

$6.$

Costs of frozen onion rings and French fries

Design

$7.$

Salaries of the food specialists who create new sandwiches for the restaurant chain

Distribution

$8.$

Cost of $"$to$-$go$"$ bags