Economic models like the are not physical models, but instead are diagrams or graphs or even mathematical equations that represent economic patterns or theories.
a) specialization model
b) financial investment market
c) circular flow diagram
d) financial capital market

Jagjit company designs and builds retaining walls for individual customers. on august 1, there were two jobs in process: job 93 with a beginning balance of $8,650, and job 94 with a beginning balance of $7,270. jagjit applies overhead at the rate of $9 per direct labor hour. direct labor wages average $16 per hour. data on august costs for all jobs are as follows:

Wallis company manufactures only one product and uses a standard cost system. the company uses a predetermined plantwide overhead rate that relies on direct labor-hours as the allocation base. all of the company's manufacturing overhead costs are fixed—it does not incur any variable manufacturing overhead costs. the predetermined overhead rate is based on a cost formula that estimated $2,886,000 of fixed manufacturing overhead for an estimated allocation base of 288,600 direct labor-hours. wallis does not maintain any beginning or ending work in process inventory.

Annuity payments are assumed to come at the end of each payment period (termed an ordinary annuity). however, an exception occurs when the annuity payments come at the beginning of each period (termed an annuity due). what is the future value of a 13-year annuity of $2,800 per period where payments come at the beginning of each period? the interest rate is 9 percent. use appendix c for an approximate answer, but calculate your final answer using the formula and financial calculator methods. to find the future value of an annuity due when using the appendix tables, add 1 to n and subtract 1 from the tabular value. for example, to find the future value of a $100 payment at the beginning of each period for five periods at 10 percent, go to appendix c for n = 6 and i = 10 percent. look up the value of 7.716 and subtract 1 from it for an answer of 6.716 or $671.60 ($100 × 6.716)