PLEASE HELP! Ive asked this question already and havent gotten an answer :(

Problem 19-7 Tamarisk Corp. sold an investment on an installment basis. The total gain of $75,600 was reported for financial reporting purposes in the period of sale. The company qualifies to use the installment sales method for tax purposes. The installment period is 3 years; one-third of the sale price is collected in the period of sale. The tax rate was 40% in 2017, and 35% in 2018 and 2019. The 35% tax rate was not enacted in law until 2018. The accounting and tax data for the 3 years is shown below. Financial Accounting Tax Return $88,200 Income before temporary difference $88,200 75,600 25,200 Temporary difference $163,800 $113,400 $88,200 $88,200 Income before temporary difference Temporary difference 25,200 Income $88,200 $113,400 2019 (35% tax rate). $88,200 Income before temporary difference $88,200 Temporary difference 25,200 $88,200 $113,400 ncome Calculate cumulative temporary differences for years 2017-2019