Accounting procedures allow a business to evaluate their inventory costs based on two methods: LIFO $($last in first out$)$ or FIFO $($first in first out$).$ A manufacturer evaluated its finished goods inventory $($in $$000$s$)$ for five products with the LIFO and FIFO methods. To analyze the difference, they computed FIFO $$ LIFO for each product. We would like to determine if the LIFO method results in a lower cost of inventory than the FIFO method.

Product FIFO $($F$)$ LIFO $($L$)$

$1225221$

$2119100$

$3100113$

$4212200$

$5248245$

If you use the $5\%$ level of significance, what is the critical value?

Select one:

a$.+2\mathrm{.}132$

b$.\backslash$pm $2\mathrm{.}776$

c$.+2\mathrm{.}262$

d$.+1\mathrm{.}645$