Use R commands to accomplish the following

a. Load the data file "sales. RData" (note that this is already in R's format so you can use the function load rather than read. csv).
b. Provide a summary of each column in the sales data frame.
c. Describe how the data is organized (i. e. what is contained in each row or what is the unit of observation).
D. What were the total sales in 2017

Magic realm, inc., has developed a new fantasy board game. the company sold 15,000 games last year at a selling price of $20 per game. fixed expenses associated with the game total $182,000 per year, and variable expenses are $6 per game. production of the game is entrusted to a printing contractor. variable expenses consist mostly of payments to this contractor.required: 1-a. prepare a contribution format income statement for the game last year.1-b. compute the degree of operating leverage.2. management is confident that the company can sell 58,880 games next year (an increase of 12,880 games, or 28%, over last year). given this assumption: a. what is the expected percentage increase in net operating income for next year? b. what is the expected amount of net operating income for next year? (do not prepare an income statement; use the degree of operating leverage to compute your answer.)