Tupperware Brands, a reusable-container maker, has delayed filing its annual results due to internal control issues and a shortage of accountants. The company has been facing liquidity and accounting problems, losing its accounting firm PricewaterhouseCoopers and disclosing a material weakness in its internal control over financial reporting. The shortage of skilled accountants has become a widespread issue, affecting larger companies like Tupperware as well. Some companies have considered raising salaries and seeking temporary outside help to address the shortage. Tupperware's latest quarterly report showed a decline in revenue and a net loss. [Extracted from the article]