Answer:
149
Explanation:
You want to know the number of cases of canned vegetables in the storeroom when 86, 61, 54, and 78 cases were removed from the initial inventory of 300 cases, and two lots of 59 cases were added.
Inventory
The current inventory is the starting inventory less removals plus cases received. A calculator is handy for adding these up.
300 -86 -51 -54 -78 +2·59 = 149
There are 149 cases in the storeroom now.
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Additional comment
We observe the inventory was reduced by 151 cases for the month. It appears the receipts haven't kept up with the sales, suggesting a possible out-of-stock condition by the end of the next month.