On January 1, 2020 Rosen Company purchased 35,000 which is 15% of the total common stock owned by Polo Corporation for 770,000. During 2020 Polo Corporation reported a net profit of 400,000 and declared a dividend of 100,000. Requested: (a) If Rosen Company records its investment using the cost method (there is no significant effect), prepare the journal entry that Rosen Company should record in relation to the investment made. (b) Suppose that Rosen Company has significant influence in Polo Corporation so that Rosen Company must record its investment using the equity method, prepare the journal entry that Rosen company must present in relation to the value of its investment, and present the calculation of the investment balance as of December 31, 2020