Complex sentence: Facebook will pay $4 billion in cash, $12 billion in Facebook shares and $3 billion in restricted stock units to be granted to WhatsApp founders and employees that will vest over four years.
Split into simpler sentences: Facebook will pay $4 billion in cash and the remaining $12 billion in Facebook shares. It calls for an additional $3 billion in restricted stock units to be granted to WhatsApp founders and employees that will vest over four years.