SOP $($Search Optimization Pro$)$ sells online digital advertising to local business via its sales

associates. When a sales associate approaches a local business, he or she tries to convince

the local business to let SOP use its experience to manage the business's online

advertisements on Google, Facebook, etc. If the sales associate is sucoesstul, the business

signs a contract with SOP and they agree on the terms. The contract includes following details:

Monthly advertising budget $($b$),$ this is the maximum amount SOP will spend on behalf of

the business each month.

Digtal Advertising Setup Fee, Annual $($s$)$: $$3000-5000,$ negotiable and varies according

to each contract's terms and the business's complexity. I want you to implement this

constraint and ask user repeatedly for a value in the range until they give you an

acceptable value. $($Hint: You can do this with an additional while loop.$)$ Display a

message if they do not and ask again, tirelessly.

Monthly Management Fee $($f$)$: $$2800+18\%$ of Monthly Ad Spend

$f=2800+0\mathrm{.}18**b$

Based on the terms of the contract we can then estimate the total annual revenue $($TAR$)$ eamed

from a new business as:

TAR $=s+{12}^{**}f$