Type Mismatch-calculating textbox values from different multipage tabs

I'm sure this is easy for some of you, but I just can't figure it out! I keep getting a type mismatch when I try to calculate the product of two text boxes, each from a different tab on a multipage userform. Here's my code:

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Where allocations 1 and 2 are percentages (%) entered in on one multipage sheet, and the amount ($) is on another multipage sheet (named InvoiceInfo) of the same userform. I want to get the product of these, but I keep getting type mismatch error! Please help! Many many thanks in advance!

inv appr xl help.xlsm



I have commented out some of the things that aren't working.