Is it true or false that societies did not develop monetary commodity systems until the mid-nineteenth century

On january 1, year 1, purl corp. purchased as a long-term investment $500,000 face amount of shaw, inc.’s 8% bonds for $456,200. the bonds were purchased to yield 10% interest. the bonds mature on january 1, year 6, and pay interest annually on january 1. purl uses the effective interest method of amortization. what amount (rounded to nearest $100) should purl report on its december 31, year 2, balance sheet for these held-to-maturity bonds?

Cash flows during the first year of operations for the harman-kardon consulting company were as follows: cash collected from customers, $360,000; cash paid for rent, $44,000; cash paid to employees for services rendered during the year, $124,000; cash paid for utilities, $54,000.in addition, you determine that customers owed the company $64,000 at the end of the year and no bad debts were anticipated. also, the company owed the gas and electric company $2,400 at year-end, and the rent payment was for a two-year period. calculate accrual net income for the year.

In the market for lock washers, a perfectly competitive market, the current equilibrium price is $5 per box. washer king, one of the many producers of washers, has a daily short-run total cost given by tc = 190 + 0.20q + 0.0025q2, where q measures boxes of washers. washer king's corresponding marginal cost is mc = 0.20 + 0.005q. how many boxes of washers should washer king produce per day to maximize profit?