I'm attempting to simplify my fundraising page, and would like to show exactly how much each donation would help us out. I've listed the options below, but I would like for the first two dropdown boxes to change the third one depending on the combination chosen. Fruthermore, I'd like for the third dropdown box to adjust the first two if that one is selected. IFFTT, basically. No action needed beyond that, as it's mostly meant for informative purposes. Is this possible? Thanks for any help whatsoever.
Examples:
1 donation of $50 = 1 hour of gym time.
10 donations of $50 = 10 hours of gym time.
3 donations of $500 = 6 days of gym time.
9 donations of $500 = 27 days of gym time.
3 donations of $5,000 = 3 months of gym time.
<span style="font-size:11px; font-family:arial;">
<select>
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
<option>6</option>
<option>7</option>
<option>8</option>
<option>9</option>
<option>10</option>
</select>
donation(s) of
<select>
<option>$50</option>
<option>$500</option>
<option>$5,000</option>
</select>
=
<select>
<option>1 hour</option>
<option>2 hours</option>
<option>3 hours</option>
<option>4 hours</option>
<option>5 hours</option>
<option>6 hours</option>
<option>7 hours</option>
<option>8 hours</option>
<option>9 hours</option>
<option>10 hours</option>
<option>3 days</option>
<option>6 days</option>
<option>9 days</option>
<option>12 days</option>
<option>15 days</option>
<option>18 days</option>
<option>21 days</option>
<option>24 days</option>
<option>27 days</option>
<option>30 days</option>
<option>1 month</option>
<option>2 months</option>
<option>3 months</option>
<option>4 months</option>
<option>5 months</option>
<option>6 months</option>
<option>7 months</option>
<option>8 months</option>
<option>9 months</option>
<option>10 months</option>
</select>
of gym time.</span>