How do I match multiple receipts of varying amounts to expense payments that are in nice round sums and do not match up?

Before my business began earning any money I paid out of my personal account for certain setup costs, such as computer equipment and software. Then, when money started coming into the business, I repaid myself with a series of lump sums ... round figures with a final balance repayment at the end. I kept receipts for all the items I paid for personally and uploaded them into Quickbooks (which does a great job of scanning them and automatically detecting supplier, date, and total amount, so thank you for that). I also categorised the appropriate repayments from my bank account, in Quickbooks, as expenses. And everything adds up. The expenses come to the same amount as the receipts do, as you’d expect. However, individual items do not conveniently match up with a corresponding expense, because items were bought as and when required and have a variety of costs, whereas the expenses (the repayments to myself) were nice round lump sums. Let me give an example using just the first few items. I have receipts for £59.95, £2,748.99, £39.25, £329.99 and £550.96 that total £3,729.14. Now let's suppose that I repaid myself, and hence have expense items for, £1,000, £2,000 and £729.14 that again total £3,729.14. How can I review, and match, those receipts against those expenses? What I would ideally like is to be able to put a tick against those three expense items and then select the option to ‘group these line items into one big expense item’. That way I'd now have £3,729.14 as an expense item, and I could review each receipt and pair them with that one expense, ignoring the message that pops up to say the totals don't match. But there isn't an option to do that, so what can I do? And if I cannot do anything, is it okay to have several thousands of pounds of expenses simply marked as an expense by me, without supporting receipts linked to them?