The e-mail purports to be from a supplier, more specifically a contractor; it has all the right business speak that a contractor might actually use when trying to gently remind you of an unpaid invoice.
The "end of fiscal year" adds further pressure; it sets a deadline for the payment of the invoice, and crucially makes that deadline something that is imposed by a third party; that way, the scammer discourages attempts to argue about the payment term and makes faster payments happen.
Perhaps you *do* reply, though, to inquire about the line items, despite your "colleague"s approval - the e-mail will go to an e-mail that's *wrong*, but not obviously so!
A lot of companies legitimately use Sendcloud for their internal e-mail affairs, and so it going through a Sendcloud address is a credible thing. This domain, sendcloud-management.com, is probably not actually owned by Sendcloud, but it will *appear* to be to a hurried accounting employee trying to keep a supplier happy!
I receive these kinds of e-mails because a shitty 'adtech' company erroneously added me to their "business leads" list at some point, despite that not being a business address at all.
But most of the recipients on that list are going to be actual businesses, and I bet that at least some of them will have been caught out by this, and will be paying the "invoice" without further thought.
This is how you scam a company.