ABC Bank receives a spread of GHS$0\mathrm{.}5$ per US$ and $6\mathrm{.}849\%$ of spread $($or $0\mathrm{.}06849$ decimals$)$ on the trading of foreign currencies.

a$.$ Determine its bid rate.

b$.$ Determine its ask rate.

c$.$ Peace Ltd$,$ a customer, needs US$$5$ million to buy a machine from Boeing Ltd$.$ How much is the cost of the machine in GHS$?$

d$.$ What is the profit of the bank?

e$.$ Love Ltd$,$ a customer, has US$$2$ million but needs GB$.$ If ABC Bank quotes the GHS$/$ GB$$ as $4\mathrm{.}504\mathrm{.}99,$ how much GB$$ will Love Ltd get?

f$.$ What is the profit of the bank on the transaction of Love Ltd$?$