1) build more farms for domestic grain production
2) build a port to import grain by ship (if necessary). This will "inflate" the price of imported grain much less quickly

as recommended above, produce locally. But also it's important to consider that it's easier to mitigate rising crop prices when you export clothing rather than booze/food.

If you export clothes, you can import crops, booze and food and still turn a profit (provided you use trains and produce your own chemicals)

But with booze the value is lower so at some point you will have to invest in your own agricultural sector.

Crops have an incredibly low return on investment and will require a lot of initial capital to get going.

For one large farm in the pre modern industry for instance, you have 23 vehicle slots, i tend to do 11 tractors, 11 combines, and two distribution offices with 10 covered hulls to gather crops from 11 large fields. It yields about 2.6k tons of crops per year and will drastically reduce your crops imports and hopefully mitigate your inflation problem.
(with how garbage the early start agriculture vehicles are, i think that's pretty much the ceiling for a single farm) Those figures are with solid fertilizer only. You can eek more out with liquid fertilizer.

In my case, in a game i had, i had calculated a saving of 35k roubles per year in imports at the time. Not a lot when you consider the cost of establishing this industry. But still a very sizeable saving at the scale of one year, because by this point crops become your number one yearly expenditure.

It does get better with technology for sure, but the general idea remains: crops require a large initial cost and take a fair amount of years to amortize.

What that also translates to is that unless you're already turning in a profit (through exporting high value clothes for instance), branching out into your own crops is likely to mean a Lose-more scenario for you in the short-mid term as it's a terrible way to leverage debt.

Math for you: you need 41610 crops/year for this factories. This equals to 70 big fields at 200% fertility per year, with seasons enabled. Around 6 farms, depending of your mecanisms and configuration.

I am going to recommend *against* local production, especially in a tight-money scenario. Local production only becomes a thing mid-game (after 1965) when you have better equipment at your disposal. Pre-'60s equipment is absolutely trash and you should be doing farming only for roleplay reasons or for flavour, NOT for production purposes.

Also, people assume that locally produced crops are free, but farming ain't cheap, and to fully stock 2 Food Factories and Distillery, you need a pretty big setup, and not to mention some pretty damn strong logistics, if you don't want your crops to rot on the fields every winter. In between the equipment and skyrocketing fuel costs for your swarm of large covered-hull trucks, you might realize that what's on paper doesn't match what's in practice. And just imagine how many gigantic silos you'll need. All that concrete is gonna cost money.

The profit margin from food and alcohol is smaller than the one for fabric (and ultimately, clothes), but it's still a pretty decent profit margin.

Unless you're doing something wrong, you should still be able to make good money, despite the spike in crop prices. This is because the increase in crops will also cause an indirect increase in all dependent resources (same as when coal or iron increase indirectly affects the price of steel), so that means the export prices for food/alcohol also rise accordingly.

In order to maximize profit, your factories also need to be efficient. The smaller profit margin means you need more exports to make it count. The problem might not be with the prices, but with workforce, and worker efficiency is a major player here. It's why keeping happiness and loyalty high is very important. If your average productivity is in the ~70% area, you're gonna struggle to get enough products to make a difference.