Hmmm, you may chose to diplomatically ignore your SIL on this matter.
To give you an idea about chops: from our
2 whole 6 month old GOS boars (so
4 halves of big boys), we had a large joint for the farmer (a family of 5), and the rest of the loins were cut into chops for us. I counted 76 chops...
Sounds like a lot? Have a look at the back (loin) of a pig, where the chops will be coming from.
Say a chop is on average 2cm thick, a bit under an inch.
15 chops x 2cm means you need 30cm worth of loin for 15 chops, about a foot in length.
But there are chops on both side of the pig's spine, so a 1 foot length of the pig's back gives you about 30 chops as you get a set from each side (half) of the pig.
And the loin of a large 6 month old pig is longer than one foot...
Adds up nicely, doesn't it?
So as you can see, with the loin cut in chops and with mince turned into sausages, the meat will go much further than with roasting joints!