Financial Analysis Using Adjusted Account Data

Selected T$-$account balances for Bloomfield Company are shown below as of January $31,$ which reflect its accounting adjustments. The firm uses a calendar$-$year accounting period, but prepares monthly accounting adjustments.

$\backslash$table$[[$Supplies$],[$Jan$.31$ Bal. $1,350]]$

$\backslash$table$[[$Supplies Expense$],[$Jan$.31$ Bal. $|,440|,]]$

$\backslash$table$[[$Prepaid Insurance.$],[$Jan$.31$ Bal. $861,]]$

Insurance Expense

$\backslash$table$[[$Insurance Expense$],[$Jan$.31$ Bal. $123,,]]$

$\backslash$table$[[$Wages Payable$],[1,050$ Jan. $31$ Bal.$]]$

$\backslash$table$[[$Wages Expense$],[$Jan$.31$ Bal. $4,800,]]$

$\frac{\text{T}\text{r}\text{u}\text{c}\text{k}}{\text{J}\text{a}\text{n}\text{.}31\text{B}\text{a}\text{l}\text{.}11,220}$

$\backslash$table$[[$Accumulated Depreciation$-$Truck,$],[,2,805$ Jan. $31$ Bal.$]]$

a$.$ If the amount in supplies expense represents the January $31$ adjustment for the supplies used in January, and $$930$ worth of supplies were purchased during January, what was the January $1$ beginning balance of supplies?

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b$.$ The amount in the insurance expense account represents the adjustment made at January $31$ for January insurance expense. If the original insurance premium was for one year, what was the amount of the premium, and on what date did the insurance policy start?