I need help with all 4 of these . And I do need to show work for all of them

Answer:
Step-by-step explanation:
11) Profit = Selling price - purchase price - other expenses
[tex]= (2000*7)-12780-26=1194[/tex]
12) Profit = Selling price - purchase price - other expenses
[tex]=52.25(550)-28275-32=430.50=430[/tex](after rounding off)
13) Annual interest on bond
=INterest rate on face value of bond for 1 year
[tex]=2000(6%)=120[/tex]
14)Cost of bond
= quoted value (rate)
=3500(80.5)
=2817.50
15) Cost of bond
= quoted value (rate)
=4250(83.5)
=3548.75