Answer:
IGR = 9.1640%
Step-by-step explanation:
![IGR = (ROA * retention)/(1-(ROA * retention))](https://img.qammunity.org/2020/formulas/business/college/gfdo8rkm423hytvog2dwxu46nyqn0em6s0.png)
.45 dividend payout ratio
1 - .45 = .55 retention ratio
ROA = Return on Assets
![(Earning \: before\: interest\:and\: taxes)/(Toal \: Assets)](https://img.qammunity.org/2020/formulas/business/college/uin8woo683cajdmejxoxzjcrs208sdthmi.png)
Income before taxes 6,200
Assets 11,820 + 28,800 = 40,620 Total Assets
ROA 6,200 / 40,620 = 0.15263417
![IGR = (ROA * retention)/(1-(ROA * 0.retention))](https://img.qammunity.org/2020/formulas/business/college/ol0rcacls0z6hhs4d9it0o85sb3h0eawpr.png)
![IGR = (0.15263471 * .55)/(1-(0.15263471 * 0.55))](https://img.qammunity.org/2020/formulas/business/college/c8yj69q2aiwjn1hz556fb0575jnos9qtvb.png)
IGR = 0.09164031 = 9.1640%