I've been working on this all week, and have gotten somewhere with Randy Fay's help, but I need further assistance in understanding this.

Here's what I posted to IRC #drupal-commerce, but no response.

cmcoppenbarger> I have a use case I need help writing a rule for in commerce.
basically, I have a custom line item list(integer) with the 3 different prices.
But these represent the early bird prices for an event.
It works okay for a rule to calculate the sale price based on whether they select one of the 3 items
However, after the early bird date passes, I need the first to add $10, 2nd to add $15, and 3rd to add $20.

My thought is to do a loop in the action area to detect values, but Rules doesn't offer that or it doesn't seem to. Should I be looking a component that I call on a loop? When I try to use a loop, it doesn't find the "field_seminar_day_select".

I'm trying to accomplish this without making multiple SKUs for the same day.

Export of rule that works for early bird calculating.

{ "rules_registration_pricing" : {
"LABEL" : "Registration Pricing",
"PLUGIN" : "reaction rule",
"ACTIVE" : false,
"REQUIRES" : [ "rules", "commerce_line_item", "commerce_product_reference" ],
"ON" : [ "commerce_product_calculate_sell_price" ],
"IF" : [
{ "entity_has_field" : {
"entity" : [ "commerce-line-item" ],
"field" : "field_seminar_day_select"
}
},
{ "entity_has_field" : { "entity" : [ "commerce-line-item" ], "field" : "commerce_product" } },
{ "entity_has_field" : {
"entity" : [ "commerce-line-item:commerce-product" ],
"field" : "field_seminar_early_date"
}
},
{ "data_is" : {
"data" : [ "site:current-date" ],
"op" : "\u003E",
"value" : [ "commerce-line-item:commerce-product:field-seminar-early-date" ]
}
}
],
"DO" : [
{ "data_calc" : {
"USING" : {
"input_1" : [ "commerce-line-item:field-seminar-day-select" ],
"op" : "*",
"input_2" : "100"
},
"PROVIDE" : { "result" : { "seminar_early_price" : "Seminar early price" } }
}
},
{ "commerce_line_item_unit_price_amount" : {
"commerce_line_item" : [ "commerce_line_item" ],
"amount" : [ "seminar-early-price" ],
"component_name" : "base_price",
"round_mode" : "1"
}
}
]
}
}