I want to offer donations with set and/or custom amounts

I have a link inside the jot form that is showing the whole webpage instead of just the form. Is there a way to replace the form if a condition is met? 

There is a set of donation amounts of the regular donation form. The alt donation form lets you put in your amount. 

Is there a way to combine them inside the same form? 

I have a whole other page, http://bethshalomkc.org/donate/donations-other-levels/

but would prefer it to be one form, if possible. 

These forms were made 4 years ago and your coding has changed. 

Yes it is possible to achieve your requirement. Here are the steps you should follow:

#1. Instead of displaying the membership options in the PayPal question, you can add the products in a check box question.

#2. Add a text box to collect the donation amount. 

#3. Add a "Form Calculation" widget in your form to calculate the total amount of membership and donation.

#4. Add PayPal payment question in your form and set it to read the amount from the calculation widget. The following guide should help you how to pass calculation to PayPal payment question:  http://www.jotform.com/help/275-How-to-pass-a-calculation-to-a-payment-field 

Please check the screenshot below for all the steps:

Please take a look at the following cloned form and see if this works as expected:  http://form.jotformpro.com/form/51825452751961? Feel free to clone this form for a closer look. The following guide should help you in form cloning:  http://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL

Can you look at my form. It is showing X10 of what I think I put in. Plus, can the calculation field at the bottom be invisible? 

http://bethshalomkc.org/donate/donate-3/

I checked your form and your calculation is currently set to combine two fields together, rather than add them:

If you change your calculation to add the two values instead of combine them, the total will show correctly:

To hide the field, click on the calculation field, click on the little gear icon in the top right, then click on "Hide Field":

Here is how the form would look and function with the changes made:

https://form.jotform.com/61386516281963

Great. That worked. 

Glad to hear it!  If there is anything else we can assist you with, let us know and we will be happy to help.