Answer:
Allowance for uncollectible accounts: ($ in millions)
Balance, beginning of year $39.7
Add: Bad debt expense $30.0
Less: End of year balance ($42.4)
Write offs during the year $27.3
Accounts receivable analysis:
Balance, beginning of year ($2,076.6 + $39.7) $2,116.3
Add: Credit sales $19,281.6
Less: Writeoffs ($27.3)
Less: Balance end of year ($2,949.4 + $42.4) ($2,991.8)
Cash collections $18,378.8