funny thing is $,$ Taxable interest is $624,$ not $623\mathrm{.}63.$

Total amount from Form$($s$)$ W$-2,$ box $1$:

Donna's W$-2$: $$50,198\mathrm{.}00$

Chris's W$-2$: $$3,200\mathrm{.}00$

Total: $$53,398\mathrm{.}00$

Taxable interest:

$$623\mathrm{.}63$

Other income from Schedule $1,$ line $10$:

Scholarship received by Chris: $$1,750\mathrm{.}00$

Prize from CER sweepstakes won by Chris: $$10,000\mathrm{.}00$

Gifts received by Donna:

Value of tickets to professional football game: $$200\mathrm{.}00$

Value of flowers: $$40\mathrm{.}00$

Child support paid by Chris: $$300\mathrm{.}00$ per month x $12$ months $=$ $$3,600\mathrm{.}00$

Inheritance received by Chris: $$15,000\mathrm{.}00$

Total: $$30,590\mathrm{.}00$

Add lines $1,2,$ and $3$:

$$53,398\mathrm{.}00($line $1)+$ $$623\mathrm{.}63($line $2)+$ $$30,590\mathrm{.}00($line $3)=$ $$84,611\mathrm{.}63$