That's what you have to try and work out. That's why I said it was possible to make a reasonable guesstimate.
The dates are listed as new style because Feb 1673 would otherwise be later than April 1673, but the coins would be dated OS, so the first line and most of the second would be dated 1672. Striking stops in Feb 1675/6, so no 1676 coins. It also means that 1673 is rarer than the books suggest and 1675 commoner, thus making the case for the majority of 1675 halfpennies to be 5/3 based on the rarity of unambiguous straight 5s.
In terms of the numbers quoted per line, the first line seems to have an unrealistically high strike rate for 5 presses, working out at 3104 pence/press/day continuously over the 169 day period given. There would be the inevitable down time to change dies and they might have been given Christmas Day off, but I think it is do-able. Based on farthings only with no down time it would be 8.6 coins/min over the whole period, or 10 coins per minute giving an allowance of 1 day in 7 down time. With output of 1 halfpenny to every 4 farthings, you can reduce the number of coins struck by appoximately 10% to make up the value in pence. One struck every 6 or 7 seconds on a fly press is achievable in my view, but the buggers would have been sweating.