$6.$ What is LIFO reserve? Why is the adjustment of LIFO reserve to produce FIFO$-$based numbers necessary? $7.$ What is the cumulative effect of LIFO inventory accounting on Leggett & Platt$$s pre$-$tax income as of $2016$ year$-$end compared to FIFO accounting?

$8.$What is the cumulative dollar amount of the company$$s tax expense been affected by the use of LIFO inventory costing as of the year$-$end $2016,$ assuming the tax rate is $35\%?$

$9.$ What effect has the use of LIFO inventory costing had on the company$$s pre$-$tax income and tax expense for $2016$ only $($assume tax rate of $35\%)?$