Nixtel Inc. reported net receivables of \(\$ 2,583\) million and \(\$ 2,785\) million at December 31, 2020 , and 2019, after subtracting allowances of \(\$ 62\) million and \(\$ 88\) million at these respective dates. Nixtel earned total revenue of \(\$ 10,948\) million (all on accounts) and recorded bad debt expense of \(\$ 2\) million 'for the year ended December 31, 2020.

{Requirements}

Use this information to measure the following amounts for the year ended December 31, 2020 :

a. Write-offs of uncollectible receivables

b. Collections from customers