but dworsky has no indication manufacturers are trying to rip people off.cision. >> it's a costly decision. they have to retool their manufacturing plant, resize the packaging, but even with all pthose costs, manufacturers thik it's worth it. >> reporter: and we asked manufacturers the products we highlighted for comment but none responded. you've got to be a pretty savvy shopper to spot shrinkflation. years ago, peanut butter-makers figured out a way to put less butter in the jar by putting the indent in the bottom. >> o'donnell: we've learned a lot, carter, thank you. uvalde, texas, we're learning more about what's happening in the classrooms at robb elementary school as police officers were waiting in the hallway during the massacre. cbs' lilia luciano spoke to a retired f.b.i. special agent who created the agency's active shooter program, and what you're about to hear is disturbing. >> get in your room! get in your room! >> reporter: those are the frantic cries of a teacher at robb elementary who called 911 as the shooter approached the school. already,

but dworsky has no indication manufacturers are trying to rip people off. >> i can imagine it's not anasy decision for companies? >> it's actually a costly decision for companies. they have to retool their manufacturing plant. they have to resize the packaging. but even with all those costs, manufacturers think it's worth it. >> reporter: and we asked manufacturers the products we highlighted for comment, but none responded. you've got to be a pretty savvy shopper to spot shrinkflation. years ago, peanut butter makers figured out a way to put less product in a jar that looks the same size by putting this indent on the bottom. norah? >> i learned a lotfrom your piece. carter, thank you. >>> all right. well we turn now to president biden's historic trip to the middle east. his first stop is israel, a country he has previously visited nine other times. biden issued a tough warning to iran over its troubling nuclear program, a deep concern for the israelis, saying he'd be willing to use force as a last resort. cbs' ed o'keefe is traveling with the president. >> reporter: president biden ar

paul: so the onus is on the consumer to be hypervigilant, says dworsky.et, there's that unit price for everything, right? edgar: i don't know the statistics of usage of unit pricing. my sense is it's very low. paul: moreover, since the self-proclaimed mr. consumer -- edgar: where unit pricing doesn't help is when the individual product changes. so unless you've memorized that your keebler cookies were 14.3 cents an ounce and now it's 16.7 cents an ounce, is not going to help you. paul: i would i would be totally overmatched. edgar: i mean, it's bad enough that i try to counsel people, look at the items you buy all the time, look at the net weight, the net count, memorize it. and when you go back to the store, double check that it hasn't changed. how else are you going to, you know, make a choice intelligently if you don't know what it used to be? paul: yeah, but that's almost impossible. who's going to keep track of that? you are either a professional or a lunatic. edgar: a little bit of both. paul: meanwhile, for the rest of us, inflation at the store th