Create new Project in MS Project:

Prepare Tea Party

$1\mathrm{.}1$ Send invitation $-2$ days

$1\mathrm{.}2$ Combine attendance confirmation $-1$ day

$1\mathrm{.}3$ Create menu $-1$ day

$1\mathrm{.}4$ Buy the products $1$ day

$1\mathrm{.}5$ Cook deserts $-2$ days $-10$ hours

$1\mathrm{.}6$ Run Party $-6$ hours $-0\mathrm{.}25$ of day $($be creative, you need hours to adjust the servant's hours$)$

$1\mathrm{.}7$ Clean $-1$ day.

Resources:

Manager $-$$$30/$h

Cook $-$ $$20/$h

Servant $-16/$h$,6$ hours

Cleaner $16/$h$,5$ hours

Food $-$ $$50$ per invited person, plan to host $20$ people

Rent room $-$ one time payment before the party.